I know in Honey, I Shrunk The Audience the Dad (I don't know his name) multiplies his son's pet mouse in this crazy machine. So there's thousands of "mice" running through the audience. And there are special paddles under the seat that hit your feet so it feels like mice are running into your legs. It's so gross. I did it on our first trip to WDW when I was 9 and it scarred me for life for 3D movies. That and ITTBAB. Absolutely horrible! I did ITTBAB when I was 9 too. My dad had to leave the theater with me because I was freaking out so much. I got maybe 2 minutes into the show. lol