Haye much too hasty?
As anyone who has ever attempted to eat a microwaved pasty will be well aware, unreasonable haste can leave you badly burned.
I doubt if David Haye has ever tackled a microwaved pasty. But he might want to think about making them the cornerstone of his diet following his headlong decision to fight Vitali Klitschko in London next summer.
Haye will be giving away about 30lb in weight and four-and-a-half inches in height to the WBC heavyweight champion from Ukraine. Perhaps more important, Vitali has never been knocked down, and rarely rocked.
No wonder Haye's trainer Adam Booth was so keen on little brother Wladimir. An inch shorter than Vitali and 10lb lighter, Wladimir has also been knocked out three times and sent to the canvas many times more.
"All of a sudden they've started putting the one with the stronger chin in front of us," said Booth after Haye's knockout of Monte Barrett last month. "That wasn't the plan."
In truth, the original plan probably wasn't to fight either of the Klitschkos, but rather Nigeria's Samuel Peter, whose lumbering style and lack of head movement appeared tailor-made for the quick-fisted Haye.
But Vitali put paid to that, stopping Peter in October to reclaim the WBC belt he gave up in November 2005, when he dragged his creaking body into retirement.
"Vitali was ringside for my victory over Barrett and I think he saw something in me that he doesn't want his brother getting involved in," Haye told the BBC.
"Vitali knows he has got a better chin than Wladimir. He's a lot sturdier and stronger, so I think he made a family decision and put himself in the firing line."
"A better chin", "sturdier and stronger". Three good reasons to avoid Vitali at all costs. But that's never been Haye's way.
London's former undisputed cruiserweight champion says there will be no warm-up fight for Vitali, and many observers will view that as madness.
As Haye said himself following his defeat of Barrett, "when my title fight comes along I'll be prepared, because I've been in with strong guys who come to win".
But does one fight against Barrett, a game but limited heavyweight who nevertheless had Haye down, represent sufficient preparation? And what's the rush?
After all, even Evander Holyfield, a truly phenomenal fighter in his day, had six fights as a heavyweight before tilting at the title.
But Haye's recklessness should be admired, not mocked. Fans cannot spend their lives bemoaning the cautiousness of today's fighters without applauding this modern-day crusader.
The swiftness with which the deal seems to have been done suggests Vitali does not think Haye will present too many problems. And Wladimir recently likened Haye to fellow Briton Herbie Hide, who Vitali knocked out in two rounds in 2000 to claim the WBO belt.
Haye's certainly got more about him than Hide in attacking terms, but can he prosper among the big men, as Norwich's Hide was unable to do? Many will wonder if the first round of his fight against Vitali is the place to find out.
Another problem with unreasonable haste is that there comes a point when it's impossible to turn back. But David Haye doesn't strike me as the type of man - win or lose - who spends much time looking over his shoulder.
He'll fancy he has the speed to upset the odds wherever he ends up fighting Vitali Klitschko next summer. And if he doesn't, he'll no doubt shrug and say: "Better we found out sooner rather than later that I simply wasn't good enough."