These things makes me want to jump off a bridge, or if there's no bridge around, actually build one and then jump off:

Protective styrofoam stuffed so tight into a cardboard box that it makes a scratchy sound when you drag it out of there.

The thought of my hands coming in contact with styrofoam, or even worse, the thought of styrofoam coming in contact with styrofoam

My teeth coming in contact with a popsicle, and also the thought and sound of others chewing popsicle.