How much do you need for a job that big? Are you going to use white sheets underneath first, or did you want all of your victim to show through? What are you using for the victim?

I was thinking that most of the victim could be implied by shape, but not by fact. Basically show part of a head, maybe one eye and a hand and the rest could be completely covered.

Is it easy to make them wiggle? 'cause THAT would be cool. I imagine I'll need a motor for that. I have a spare windshield wiper motor, a Dayton Gear motor and a couple of ceiling fan motors that I can use for this prop (and consider free of cost, since I have them on-hand).