Martha Ross, Summer Lin / SiliconValley.com
Mike Tyson attended 4/20 festival before punching passenger on flight from San Francisco – A video circulating online shows the former heavyweight champion repeatedly strike a passenger who reportedly kept trying to talk to him after they took their seats. Hours after a mellow-appearing Mike Tyson promoted his new cannabis-infused edibles at San Franciscos 4/20 festival Wednesday, the boxing legend was videotaped throwing punches …