Steve Bruce's side have swung from highs to lows in what has been at best a wildly inconsistent start to the season. They experienced a microcosm of this within the opening 45 minutes at the Stadium of Light.
Five minutes into the game the Black Cats were facing a mountain, partly because of West Brom's newly-found ruthlessness in front of goal but also as a result of the home side's defensive generosity.
Prior to this match, Albion had only scored three league goals all season, but Wes Brown's lax marking allowed Morrison to head in their fourth from a Chris Brunt free-kick and then, a minute later, the initial squandering of possession and Michael Turner's lack of pace let Long run through to slot in another.
It was an impressive opening salvo from the Baggies, especially for a side that have made a poor beginning to what has been an admittedly tough start to their campaign.
DID YOU KNOW?
West Brom have never won a Premier League away game in October, losing seven of their nine fixtures. Their one other draw came last time out away at Old Trafford against Manchester United in October 2010.
It shell-shocked the home crowd, who quickly demanded a response, which came midway through the half and in emphatic fashion.
Bendtner was central to it at all, firstly firing home, via a deflection off Gareth McAuley, after being teed up by Sebastien Larsson's neat backheel, and then a minute later crossing for Elmohamady to head in an equaliser.
It was the first goal either had scored for Sunderland.
In truth, four first-half goals was a conservative return from an abundance of scoring opportunities for both sides, but Sunderland goalkeeper Simon Mignolet did well to twice deny Morrison and opposite number Ben Foster saved Larsson's shot on the turn. Dane Larsson also had a goal rightly ruled out for offside.
The second half was a less open affair, in which West Brom grew increasingly and efficiently conservative.
Hodgson happy with attacking display
Sunderland's best chances for a winner came from Brown's back-post header, which he put into the turf and over, and an Elmohamady shot from 12 yards palmed away by Ben Foster.
Both sides will be disappointed not to have claimed their second win of the season, but in the end each had reasons to be grateful for the point.
Sunderland manager Steve Bruce:
"It was incredible. An awful start but there was spirit and togetherness there to drag us back into the game. All credit to the players for sticking at it.
"We could quite easily have folded today but thankfully they rolled up their sleeves and got back into it. We could even have won it. We had a couple of great opportunities but we just ran out of juice.
"There's six or seven players playing their fourth or fifth game here and they know what it is all about now."
West Brom manager Roy Hodgson:
"There were 90 minutes left to play when we were 2-0 up, so the game starts all over again.
"I think we should give credit to Sunderland for really mounting a strong challenge and getting over the disappointment of a poor start both in terms of conceding goals and maybe giving the ball away far more than Steve would like in that early spell.
"At half-time, it was up to us to get our minds right again and not to think about the fact that we had been 2-0 up, but to make sure that we got ourselves organised enough to get a result in the second half."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.