The catch that changed the game.
Although it was unbeaten heading into Happy Valley, Michigan hadn't been great with the game on the line during previous weeks.
Take the 28-24 win over Akron, for example. If not for an uncalled interference on Zach D'Orazio, the Zips may have won that game.
Just yards from paydirt, D'Orazio absorbed contact on the final play of the game, causing him to barely miss what would have been the game-winning catch.
The Wolverines defense bent in the second half Saturday against Penn State, but blown coverage of a well-known weapon was the root of the issue.
Allen Robinson was capped for most of the game, but not when and where it mattered most: late in the fourth quarter and along the sidelines.
The junior receiver entered as the Big Ten's leader with 621 yards. He added 40 to the total when he made a magnificent grab along the left sideline, just a half-yard from the end zone. Luckily for Penn State, quarterback Hackenberg charged in the game-tying score (34-34).
Robinson, who had five catches for 84 yards, shouldn't have been in one-on-one coverage. Special emphasis, especially with about 30 seconds to play, should have been placed on a player who is arguably the finest wideout in college football.
Michigan got lucky in the past. Saturday, it was burned by a prolific athlete known for such exploits.