I worked at Spencers many years ago in college. We got some of these in and had a blast. One night at the end of the night I had it in a coworkers back pocket and asked him to go around the store pretending to straighten up near the last few customers. As he did a walk by we used a small one that made the customer turn his head. He ignored it for the most part. Then I sent my coworker back and he bent over right next to the guys girlfriend to tie his shoe and we pressed the button for the loud wet one. The customer got in my coworkers face and raised his fist screaming at him asking what the hell was wrong with him. I ran over as quick as I could (my coworker was terrified). I explained what was going on and showed him the remote we used. I swear we sold that guy the last 2 on the spot. He felt really bad but couldn't stop laughing.
I often hear, "if there's a God, than farts are a way of proving he has a sense of humor".