'The Walking Dead': It's all about Bob -- a theory on his unknown past

(Don't read unless you are caught up through the first two episodes of season 5 of "The Walking Dead.") Bob. Bob. BOB. The theories this week are mostly all about our now stumpy friend, who is (literally) being eaten alive by Smirking Gareth and his cannibal buddies. You knew Bob was doomed when he and Sasha started playing kissy face, but the main question has been: Did he get bitten when pulled underwater by a walker? Is that why he was outside Father Gabriel's church, sobbing in the dark, whe...