This would only work with girls that had been on the line for a few months or less (or just didn't catch on). Call to the back and let them know you need an air quality sample. Tell them to use 4 sick sacks and to capture air from forward, mid, and aft cabins. The 4th sick sack is for the random sample, they need to walk down the isle waiving a sick sack to capture that sample. It's really fun to watch if you are deadheading in the back.
The other fun stunt off the top of my head is asking the (young female) FAs if they want to peep through the "telescope" in the eyebrow window of a 727.
Of course I never did any of these things, just stories you hear on the line
