Originally Posted by Spiff

If you're carrying on, check in two 50lb boxes of rocks. "Forget" to pick them up at your destination.

This is also a great way to get rid of yard clippings, old tires or any other crap you've got around the house.

You can think of the TSA as your friendly and efficient Resident Stationary Engineers who will cheerfully take care of up to 100 lbs in each direction of unwanted junk, with no additional charge.