I can't remember where the Body Slinger came from and unfortuantely never bookmarked it. That's Hank over on the left. As you can see, he's quite skinny. The waist didn't turn out as expected, but the pants wouldn't stay on any other way. Unfortunately, I seem to have lost the pictures during the Making of Hank, so I will just have to tell you how to get to this point.
Hank is an air compressed system using a bicycle pump as the actuator.
For more information on using compressed air, please go to the Halloween-l archives website. They have a fine tutorial. I don't have an air compressor, so I use a scuba tank for my air source. Works the same as a compressor, just has a limited supply of air. You also need to have the right connections for a scuba tank, which I do.