I have an upcoming show and I've encountered a problem.
I believe I'm over analyzing again and this always happens before each show I do but sometimes they turn out to be legitimate worries. So I think it's fair to ask and there's no harm in asking...
Anyways on to my question. For two of my effects (both original

Does this come off as natural or out of the ordinary by riffling the index cards to have a spectator then stick their finger into the cards and that would be their selection(..hehe)?
Or does it appear natural to riffle index cards to have a spectator make a selection?
Finally if it's performed twice, does it arouse suspicion that it's a force?
Maybe it's me being paranoid but... I thought I'd ask....