Check out these
Hydraulically assisted RAPTOR suits. <<< Video #1
Video #2 - baby TRex
Yes, there is a person in that costume. What I would give for one of these to scare trick or treaters.
Imagine hiding in the bushes with this thing, speakers flanking your "prey".
First, you rustle the leaves as the small dinosaur chirping sounds attract their attention. Once they look in your direction - you burst out of the foliage, coordinated to the sound of a raptor scream. Then commence running them down
That would make an excellent YouTube video.