Board Thread:Off Topic/@comment-25396609-20160207042716/@comment-26882656-20160220130426

But think about how scratching a chalkboard makes some people react. Like they are having a seizure.

That would be an extremely powerful ability. On some people. Like completely disabling a person. But it only works on some people.

So it doesn't work on some people, while it completely takes out others. It mean, what do you call that? So I guess it relies on Luck. Yea, probably not a good idea. It seems like a story-breaker power.