This is exactly why I like t11-
Input from everyone on a certain topic.
Back on topic-
I dont think your spectator will always speak up. I mean part of the effect is just doing it. Not "i'm going to put your cellphone in this balloon" if you told them what you are about to do surely they would speak up but I think it kills the effect. So I agree with most when a casual mention or joke about allergies would be most appropriate.
Input from everyone on a certain topic.
Back on topic-
I dont think your spectator will always speak up. I mean part of the effect is just doing it. Not "i'm going to put your cellphone in this balloon" if you told them what you are about to do surely they would speak up but I think it kills the effect. So I agree with most when a casual mention or joke about allergies would be most appropriate.