The man who was captured on camera yelling nasty things to Bristol Palin about mom Sarah Palin while she took a mechanical-bull ride at a West Hollywood bar last September has now sued the political scion in federal court, according to court documents obtained by E! News. Hanks claims that Palin defamed him by suggesting in an interview that he was the reason she moved back to Alaska, and he objects to his image being used in promos for the upcoming Lifetime series, Bristol Palin: Life’s a Tripp. E Online