It's not really a secret that Mike Tyson has gone vegan since kicking a nasty cocaine habit and getting his life back together a few years ago. Just look at him in The Hangover—and look at him now. Dude's lost more weight than (enter your favorite coke rapper here). But just in case Iron Mike's vegan lifestyle (and insane love for pigeons!) is still a secret to you, take a look at the recent promo he appeared in for the Last Chance For Animals organization. First Waka Flocka posing for PETA—and now this?! Hey, apparently tough guys have hearts, too! [via Terez Owens]