I had that experience too. They said they had to x-ray them too. Why bother with the puffer at all? I don't get it.

So is the thinking that there might be plastic explosives that won't be picked up by the x-ray but will be caught by the puffer, but the x-ray will pick up the massive detonation device in my flip-flops which don't have explosives in them because I've been cleared by the puffer? Am I clear about this?