Colin Kaepernick wasn't having it yesterday when he tweeted about his recovery day and a critical fan responded telling him to continue studying. The 49ers quarterback didn't appreciate this so he replied to the fan calling him illiterate and ignorant and proceeded to challenge him to name every players responsibilities on every coverage or to mind his own business. Kaepernick then continued to insult the fan for having very few followers and to get a better life. What do you think about Colin's response? Tweet us and let us know!.