Originally Posted by dgilman
Seems that they use a small amount of explosive material to calibrate the puffer machines, and the dogs got a hit off it. Took about 30 minutes for them to figure out what was going on.
Too funny. I went through the puffer in San Juan, PR and did not find it an offensive experience. Human factors seem to be its weakness - staff seemed very bored and inattentive at 3:30 in the morning.