Cena's rapping on the bus moment refers to a time he was rapping on a WWE tour bus, Stephanie McMahon heard him, and the opportunity that arose from that led to the birth of his Dr. of Thuganomics character.

John Cena will end his WWE career on Dec. 13 as part of Saturday Night's Main Event, where he will face Gunther in one last marquee matchup.

After some brief encounters early in his career, Cena entered a fantastic duel with Michaels in 2007.