Flea's World has a link to her cousin, Mary's meme. I don't want to give the whole joke away, but it is a list of things found in Mary's couch.
I can't top that, but I have a list of the items I found in the heater vent in the boys' bedroom at my daughter's house. I was doing grandma babysitting. You know, sleeping in the spare bedroom with the dead pillow, bathing in the tub full off rubber duckies and squirty fish, and having to use the toilet with the removable potty seat. My dear daughter was recovering from surgery and I was doing what I could to help out.
Daughter's toddler son had been stashing loot in the heater vent in the bedroom he shared with his brother. I was investigating the reason why the room remained cold no matter how high the thermostat. I pulled off the grate and found (I'm not making this up)...
One toothbrush, one small flashlight, one sippy cup, two sippy cup lids, one golf ball, five glow in the dark stars, two double A batteries, one tiddly wink, one plastic toy tree, one pink "find the cure" bracelet, one door stopper, one small toy front loader, one Spiderman playing card, one purple candy heart, one key chain with blinking lights, one key ring (no keys), five raisins --hard as dried beans, two used glow sticks and one 1999 dime.
The VCR(this was a few years ago) contained: one wadded piece of paper, two DVD's, one dried pizza crust, a dry erase marker and a half slice of toast.
With a little effort I got heat flowing to the boys' bedroom. If I recall the VCR was declared a lost cause. Daughter recovered from the surgery and I survived being grandma babysitter.