Pressure of F1 battle beginning to tell
One of the stories of the Formula 1 season so far has been how Red Bull, despite having the fastest car in the field, have not been able to get out of their own way. In Turkey on Sunday, that proved to be literally the case as their race fell apart in the most extraordinary circumstances.
Mark Webber and Sebastian Vettel collided when the German tried to pass his team-mate for the lead on the 40th of 58 laps and another race they should have won - the third this season - slipped through Red Bull's grasp.
I have to say that I read the incident the same way as Martin Brundle and David Coulthard did during the race - and Lewis Hamilton, Anthony Davidson and Alexander Wurz agreed afterwards. Vettel moved right towards Webber at a time when, although he was nosing ahead, he was still alongside his team-mate.
Webber had not left Vettel very much room on the inside - as was his right. But the Australian did leave his team-mate about the width of a car - which is hard but fair, as you would expect of Webber. But when they were side by side it was Vettel who deviated his line when there was no room to do so.
It was a racing incident, certainly, but there seems little doubt that Vettel deserves the larger share of the blame.
The counter-argument is that, as Vettel was his team-mate, Webber should have given him more room than he might another driver. We'll come back to that in a moment. First, though, a bit of context.
As Jonathan Legard explored in his blog on Friday, Vettel arrived in Turkey under a lot of pressure after Webber's two dominant wins in Spain and Monaco.
The 22-year-old German has been used to ruling Red Bull, with Webber usually not quite able to keep up, and he had clearly been shocked to find the tables had been turned.
Vettel was absolutely determined not to let Webber make it three in a row in Turkey this weekend.
Normal service appeared to have been resumed through the practice sessions, when Vettel had a noticeable edge over his team-mate, Webber admitting he was "a little bit on the back foot" heading into qualifying.
So Vettel was not happy to hit more problems in qualifying, when a broken roll-bar left him down in third place. It is impossible to know whether he would have beaten Webber to pole without that problem, but it would certainly have ratcheted up the frustration another notch.
Too much can be read into these things, of course, but how much did all this cloud Vettel's judgement in the race when he found himself being held up behind his team-mate, with an even faster pair of McLarens right behind him?
An intriguing extra dimension emerged in the aftermath of the race with the information that Webber had turned his engine down to save fuel and Vettel had not in the laps immediately preceding their collision.
Webber was questioned about this by the media and, asked whether there was a reason Vettel might suddenly have been faster than him, he responded by saying: "You guys need to dig a bit more, somewhere else."
Team boss Christian Horner later explained that Vettel had managed to save an extra lap's worth of fuel in the early part of the race and therefore could run longer at the maximum engine setting, which explains why Vettel was able to get a run on Webber down the straight.
"He had an extra lap on the optimum engine setting and we couldn't back him off because he was under pressure from the McLarens," Horner explained. "He took advantage of that - as he had every right to do." Which is a fair point, but rather overlooks the fact that a driver following closely behind another car will always use less fuel than one running at the front.
The strong suggestion in Horner's interview was that he felt Webber should have given Vettel more room. That is all very well but does not alter the fact that Vettel turned into his team-mate, or that - as far as the ethics of racing go - Webber was under no obligation to do so.
Were Red Bull trying to manipulate the battle to make it easier for Vettel to pass? Or were they simply giving each driver the dues he had earned for himself? It looks rather like it was the first.
Whatever, it will do little to reduce the already simmering tensions within a team that have always been seen as fundamentally preferring their rising German star over their Australian veteran.
It is worth noting that, of all the fascinating battles between team-mates, this was the one of which least was made at the start of the season. As ever, though, the intensity of a title battle has brought the tensions to a head, and they will only increase as the season goes on.
The relationship between Button and Hamilton has been good so far this season, but there, too, there was the hint of the beginnings of some friction.
After they had assumed first and second positions in the race, both men were told to turn their engines down to save fuel. But Button was soon closing in on Hamilton and he passed him around Turns 12 and 13 with 10 laps to go, with Hamilton re-passing Button at the next corner, Turn One at the start of the next lap.
It is difficult to be absolutely sure, but as Anthony Davidson was saying in the F1 Forum after the race, Hamilton certainly seemed to be unhappy about something as he and Button gathered their thoughts before the podium ceremony. "What was going on there?" he asked Button.
Both drivers had been asked to save fuel, so Hamilton was clearly a little surprised to suddenly find his team-mate right behind him and trying to pass.
Hamilton, Button and team boss Martin Whitmarsh all played down any suggestions of trouble after the race, with Whitmarsh insisting "we didn't call off the fight".
It seems that McLaren might have slightly tripped up as they tried to get their drivers to hold position to the finish without breaking the F1 rules forbidding team orders, or that Button and Hamilton had each interpreted their team's demands differently.
This is certainly not - yet - as serious a situation as at Red Bull. But Button and Hamilton are now second and third in the world championship, right behind Webber, and it is a pressure point that will only come under further strain as the season progresses.
With just over a third of the races gone, the season could hardly be set up better. The internal battles at Red Bull and McLaren are simmering nicely, and Fernando Alonso - whose Ferrari team had a poor weekend - is still right in the mix in fourth place, just ahead of Vettel.
Five drivers separated by 15 points - the amount you get for a third place. Tensions starting to grow. Canada in two weeks' time, often the scene of mayhem even when things are otherwise quiet, should be electric.