To practice injections, we use weird slabs of fleshy rubber. I'm not sure what they are actually called, but I heard one of the instructors call it a Jelly Butt. Maybe it's a proprietary name, like Jelli-Butt. I don't know.

Lacking the ability to heal, they are full of little needle piercings. When you inject a liquid into them, it shoots out another hole somewhere, usually at another student or in your eye. I'm pretty sure this doesn't happen in real patients.