scratch-22

The relief and pleasure from scratching an itch you wish you didn't have.

It was a real scratch-22 as Dillon's eyes rolled back in his head while he vigorously scratched at the crabs he got from his mother.

Bench Jumper

Enthusiastic church goer apt to seize on the floor, stand up in the pew, or speak in tongues.

Those evangelists are some serious bench jumpers.