Wochit News - Being a multi-million dollar professional athlete is hard. San Francisco 49ers quarterback Colin Kaepernick got defensive on Twitter yesterday after an NFL fan responded to his workout routine tweet with a snide comment. Kaepernick sent out three outraged tweets in the five minutes after the fan's response, insulting everything from his intelligence to his popularity, saying in the most acerbic tweet "Your own family don't even want to know what you doin!"