Well my friends are all smart, rational people. Part of the reason they're my friends. If they all jumped off a bridge, there was very likely a good reason. Maybe it was on fire or something, and jumping was the safest option in the circumstances. So answering "yes" isn't really that smart-ass a response. Or maybe they all had a shared moment of insanity or the brain rays affected them all at once, who knows. I'd still make my own decision regardless.