A funny story where annoyingly physics gets in the way of Gedankenexperiments. Two professors clash about whether Zenos paradox is for real: Can a frog which makes jumps of 1, 1/2, 1/4, 1/8... really reach 2? Math says yes, but they agree to solve it experimentally. One prof maliciously puts the other in the companionsship of the frog. Now *he* must run too from the doomsday device which also halves his size which each step. It ends obviously - as soon as he is smaller than atoms, he passes easily through the backdoor of the contraption, and out of the shrinking field, where he regrows. The most funny thing is the end: The prof is not angry about the other playing such a prank on him, but about Nature which ruined the experimental setup with her dreckeffekts.