The Tampa Bay Buccaneers' Donteea Dye celebrates his superb catch against the St Louis Rams - rather than scoring an easy touchdown.
The wide receiver Donteea Dye tosses the ball away after making a brilliant running catch, unaware the ball was still in play and he could have dived over the goal-line.
Team-mate Luke Stocker recovered the ball after Dye's 'fumble', but the Buccaneers still went on to lose 31-23.
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You can watch Race to Super Bowl 50, Week 15 from 00:25 GMT on Wednesday, 23 December on BBC Two.