Athletes are supposed to strive for perfection. They train day and night, study film and have tons of team meetings. Every team and player action is planned in pursuit of personal accolades and team success.
Losing focus for even a second could cost your team a point, a game or a championship.
Sometimes we laugh it off, while other occasions yield a gut wrenching, agonizing defeat that makes us all lose sleep for months.
These are the 20 biggest boneheaded plays or actions in sports history, with immortalizing video to prove it.