Sometimes, even if an accomplishment is accepted as legitimate, sometimes due to lack of knowledge on how it is done in the first place or even how the artist has drawn it, some feats are plain not as good as they seem.
A prime example: Dodging gunfire.
Bullet timing is not as simple as it sounds. Things such as what kind of gun the bullets are being fired from, modern, fururistic, primitive? Also if said character reacts after the bullet was fired. We all know that anyone can aimdodge judging from where the shooter is pointing. And hell, sometimes characters even jump through fire, just because the shooters are crappy shots!
What feats can you think of that aren't as great as they are commonly made out to be?