1. Luis Suarez biting his opponent
Via @FirstpostSports
2. Steven Gerrard's backpass v France (Euro 2004)
YouTube credit: me10ssi
3. Roy Keane leaving the Ireland squad in Saipan
Via quickmeme.com
4. Greg Norman's Masters collapse
YouTube credit: potaling
5. Rory McIlroy's Honda Classic meltdown
(via Sports Memes)
6. Barcelona's Champions League thrashing by Bayern
7. Michael Jordan's stint as a baseball player
YouTube credit: NBAOnDemand1
8. Brett Favre's time with the New York Jets (when he was best remembered for his off-field antics)
YouTube credit: ABCNews
9. Mike Tyson biting Evander Holyfield's ear
10. Rafael Nadal's shock loss to Lukas Rosol
YouTube credit: MrOstrich202
11. Michael Schumacher's ill-advised comeback
12. Zinedine Zidane's World Cup headbutt
via gifsoup.com
13. Ronnie O'Sullivan's infamous concession against Stephen Hendry
(Simon Cooper/PA Wire/Press Association Images)
14. Sonia O'Sullivan at Atlanta 96
YouTube credit: markoconroy
15. Tiger Woods' two-stroke penalty debacle
Credit: BuzzFeed
16. Wayne Rooney's red card and Ronaldo's wink in the 2006 World Cup quarter-finals
YouTube credit: ZPITINN
17. John Terry's penalty miss in the Champions League final
18. Brian O'Driscoll's stamp against Italy
YouTube credit: charliepoz
19. Various Arsenal stars' unsavoury exits from the club
20. Shaquille O'Neal starring in Kazaam
YouTube credit: PaulosTheGamer
21. Ronan O'Gara's chip kick into Tim Visser's hands in the most recent Six Nations
viaWhat have we missed?