What is the grossest/weirdest/messiest thing you've had go through the wash?

So I open the washer to put the stuff in the dryer and the clothes are covered in these brown streaks. I was puzzled. Until I found my son's coat I'd tossed in the wash for the beginning of fall. Unknown to me, last spring he had stuffed the pockets full of oak pollen strands. I took out 2 big handfuls of slime from the pockets. Bleah.