Well, I know whoopie cushions would be more of the Pranksters thing, but after I treated you all to a chemistry lesson involving a whoopie cushion, I couldn't help but try it out on my very own victim!
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However, instead of the Chlorine Gas I showed all of you, I decided to use my Joker Venom- what else?!

Placed some subtitles, it was difficult to hear the poor lad.

So remember!! Put on a happy face!!  less