On a punt return in the second quarter against the Seattle Seahawks, the Rams pretended to catch the punt on the left side of the field when the ball was actually on the right side of the field. The Seahawks totally fell for it. They all ran to the Rams player who was pretending to catch the punt instead of the guy who actually had the ball (Steadman Bailey), who returned it 90 yards for a touchdown.
Here's the play (more below):
All but two Seahawks players were moving toward the wrong returner: