As a professional athlete, Colin Kaepernick's every move is scrutinized, and the football player had to step to one fan who decided to give him some advice.

After Colin tweeted about putting in hard work at the gym, the follower shot back by saying, "ab workout won't help find wide receiver #study." The 49ers quarterback wasn't having any of it, and laid into the Twitter user, telling him that he should read the tweet again before responding and proceeded to call him a "clown." 

Check out Colin's full response above. 

Source: Twitter