OK, we'll start with an easy one:
Mack White was driving his tractor-trailer under an overpass when he came to a screeching halt. Mack wasn't paying attention and inadvertently drove under the overpass that was just barely as high as his rig. The trailer was wedged so tight that he could not got forward or backward. Luckily for Mack, Professor Quantum came by and told him how he could get the tractor-trailer out from under the bridge. What did Professor Quantum suggest?Go for it.