Moss, sounds something like a costume my brother & a few friends came up with some years ago. They "dressed" my brother as a steam locomotive (he's been in a wheel chair since the early 80's). He was the hit of the party.
Yep, DB Cooper it was (I was?)! Only problem I had with that "costume" was the fact that I was using a real rig. If anyone pulled the silver handle on my chest, it would have cost $25-$30 to get the reserve chute repacked, so I was rather paranoid about that & the fact that replacement cost of a complete rig (back in the mid 80's) was around $2500-$3000!
One of the best costumes I saw was at a Halloween event in Coolidge, Arizona (a skydiving event BTW). A guy made a light frame & went as a mattress complete with bedding.