It really wasn't that I'd dug into a rabbit hole, but I used to work in a porn store. Sometimes we had to test DVDs that appeared damaged or customers reported were skipping or not working.

One was a babysitter "plotline." She wound up getting fucked by a long rainbow lolipop, and also had her clit played with by one of those spinning lolipop.

Another was like a picnic or something, and the girl was getting tomatos shoved up her vagina. Then she and another girl poured ketchup all over themselves and fucked.

Honorable mention goes to the asian porn that some guy returned because no one (him included) had realized from the cover that it was bisexual (which in porn really only refers to guy on guy on girl) porn.