He pumped once, then was late and behind on the throw. The play wasn't really there, regardless. He didn't need to force it.
Once again, Allen didn't want to take what he was given. On that 4th and 2 towards the end of the 4th, he could've just taken the 2 yards, but he goes for the end zone. Same thing in overtime. He's in easy FG range, but instead of living for the next down he forces it into the end zone.