The Harmless Superpower Game! 2.0!

[Steven_Six]

Well. Since last time we did this, it got stopped up by confusion about the power to see atoms, I figured it needed a fresh reboot.

So, the goal of the game is to come up with a truly harmless superpower. Sounds simple, right? Eh...Maybe not so much. Because according to TVTropes (tvtropes.org/pmwiki/pmwiki.php/Main/LethalHarmlessPowers), there's no such thing as a harmless superpower. So, your other goal is to figure out a way for the above power to be harmful.
RULES BECAUSE RULES
0: PXR rules. OBVIOUSLY.
1: You must find a way for the above power to be harmful, to the user or to someone else, before you can post your power.
2: Your power must have some kind of use. "The ability to blink really fast" is worthless. "The ability to blink so fast that my eyelashes turn into tiny lightning bolt projectiles"? AWESOME.
3: Try to think outside the box. The weirder, the less people would have randomly thought about it.
4: When everybody gives up on making it lethal, you win!
4.5: You probably won't win... But who knows?

So, to start this round off, let's go with...

Invisibility!