[Fedora]

They had an episode of MST3K where the 'Bots were telling Mike he was gross because his eyebrows were full of those kinda critters. He didn't believe them, despite them claiming they had read it in National Geographic; so they used the Nanobots to prove it. The nano-microscope showed there were indeed whole armies of creatures riding in tanks and conducting wars with each other in Mike's eyebrows. It was also determined that there were eggs and bacon and other things like that which had fallen into Mike's eyebrows and was providing food for the critters to breed. Pretty scary.

[Bear_in_RoseBear]

Heh, I remember that bit! I found the link to it in Ward E, but unfortunately it's a bad link...