That's why George Pickens' TD against the Giants didn't count, even though the Steelers WR was half a yard behind in the end zone

George Pickens appeared to make an acrobatic touchdown catch against the New York Giants before halftime of Monday night's Week 8 finale. However, the Pittsburgh Steelers wide receiver was ultimately deprived of the opportunity to score even though his right foot went down twice behind the end zone. Why? Because NFL rules dictate that an inbounds catch requires “both feet,” not just one foot twice.

Specifically, according to NFL rules, a forward pass is only complete if an inbound player secures the ball and touches the ground inbound with “both feet or with a part of the body other than his hands.” For this reason, players can still secure catches, including touchdowns, if their elbow, buttocks, or knee land in the field of play instead of a “second foot.” As officials demonstrated Monday, the “second foot” must always be the “other” foot, meaning players can't just tap with one foot over and over again.

Unless, of course, teams — like the Steelers, for example — vie to redefine the rules later.