I think mental powers are super cool! I ran a Marvelverse RPG and half-played/half-NPC'd (it was a very casual game, and for once my players trusted me not to screw them over) a complete weakling who had super-strong telepathy and astral projection, but could get knocked over by a strong breeze. Oh lord it was fun.

But, uh, I didn't think Finn would share my opinion. ;) At least at first.