These ultra-squicky jello blood-worms are made by immersing a bundle of drinking straws in a jello/whipping cream mixture while it's setting up. Once the jello's solidified, you squeeze the "worms" out of the straws. Voila, instant ewww!
The Idea Room: Jell-O "Blood" Worms
(Thanks, Tichrimo, via Submitterator)