There were no playoff implications at stake but as NBC Sports' Cris Collinsworth said moments after the Giants defeated the Redskins, "This is professional football, this is not supposed to happen."

"This" refers to another officiating gaffe that guaranteed Washington didn't mount a late-game comeback. The specifics:

Facing a 2nd-and-5 from their own 41-yard-line with two minutes to go and trailing 24-17, the Redskins completed what appeared to be a four-yard pass. That would have made it 3rd and 1 ... except the head linesman signaled first down (see at the bottom of the .GIF below), the chains were moved down the field accordingly, and Redskins offensive coordinator Kyle Shanahan dialed up a first-down play.

Tight end Fred Davis dropped what would have been an 18-yard gain, which should have made it 2nd-and-10 ... if not for the fact that referee Jeff Triplette signaled fourth down because the previous play never gained first-down yardage.

"They really screwed this thing up," NBC play-by-play commentator Al Michaels said at the time.

"You can't do that," Collinsworth added.