NEW YORK — By the time “Don’t Stop Believin’” spilled over the speakers at Blue Haven East, its seemingly cruelly optimistic instruction had become an ambitious request.Thirty-five seconds remained in Michigan’s season opener against Western Michigan, and noise had drained out of the Third Avenue bar — leaving only the televisions, the clink of glassware and a roomful of Michigan fans staring upward in disbelief. Maize and blue filled every gap beneath a canopy of televisions — arms cinched across chests, fingers pressed to lips and palms dragging down faces.At one table, two beers sat untouched in front of a man folded nearly in half, his fellow Wolverines fans staring at the screens with the hollow resignation of people watching the inevitable arrive.Around him, hands climbed to mouths and heads as a small contingent of fans started threading their way toward the door, their patience finally spent.“This is so embarrassing,” one fan grumbled. “It’s f—ing Western Michigan.”Some sang along, likely more out of habit than hope. Within moments, the room would find its voice again — as an unthinkable Michigan comeback played out in one final second.What in the world just happened at Michigan?Austin MeekThere was a reason for the gloom. No. 16 Michigan, favored by 27.5 points in Kyle Whittingham’s debut, opened with a touchdown then spent three quarters squandering every trace of early comfort. The Wolverines offense led by quarterback Bryce Underwood had flatlined and the nervous laughter at Blue Haven gave way to muttered obscenities.