Yep. It would look damn scary too. Buuuut - and I’m not a military tactician - I’d assume that the bomb vest, if real, would be purposed towards blowing up as many people as possible. If not now, when? And if not this crowd, which crowd?
My big fear is … well, I never like to say. Ideas run riot. I predicted what’s been happening about 16 years ago, basically to the letter.
I think - RUN! but if trapped or in true immediate danger, bunch up and attack. In this situation, an upturned table would have been a great barging device.
But who am I to say? I wasn’t there. Thank god. Still - only a few miles away.