This pinhead was made in Makehuman, its body deleted and the mesh simplified in Meshlab, but neither of these generates a .dae that Quartz Composer will understand. So it's in and out of SketchUp, which has recently left the evil Google empire. (Why does it keep asking for access to my contacts list? ACCESS DENIED.) Once into Quartz Composer there's a pretty nifty filter that introduces noise to meshes, and somewhat like Ann here you can make him get scarier according to an audio signal's volume. In his case, export to the GIMP and subsequent reduction to eight indexed colours doesn't really reduce the effect all that much. Looks much cooler live though.
As well there's an interesting and weird freebie called Sculptris that'll start you off with the digital equivalent of a ball of clay which you can then crease and pinch into horrifying proto-octopoidal shapes. Their site'll make you give them an email to download it, but I got a probably outdated alpha here.
With it I made deformed poultry.