Human Grill:

I made the sound effect for this grill from scratch. The 'sizzling meat' sound can be downloaded here.

Contained within the grill: Mp3 player, speakers mounted under the grill, flicker lights attached to grate (see picture), green light to illuminate body parts (behind painted piece of cardboard on lid [see picture-shiny piece in 1st picture.])

You can see the flickering of the lights in the video to the left. In the dark, it was a much more convincing effect, paired with the sound of sizzling meat.