If I was in that situation, then I probably would of done the same. If a passenger shouted "Smoke in the cabin" and then 11 others got up, I probably would of done the same - being the 12th.
It sounds stupid, but I don't want to find myself in a situation at 37,000FT which I could loose my life, and that of my families.
I also would of thought the crew, might of said it's totally normal or something to calm them down.