Watch Brock Lesnar return to WWE

Former UFC heavyweight champion Brock Lesnar returned to his roots on Monday night, appearing on WWE's "Monday Night Raw." With a glare and then an F-5 of John Cena, he jumped back into the world of professional wrestling after a four-year career in MMA. Warning: WWE fans chants some NSFW language in this video.
Lesnar hasn't been in WWE since 2004. He started fighting in 2007, and was given a title shot in the UFC in just his fourth fight. After taking the title from Randy Couture, he beat Frank Mir and Shane Carwin before losing to Cain Velasquez and Alistair Overeem. The December loss earned a title shot for Overeem, while it convinced Lesnar tor retire from MMA.