There's an old joke about a cop who's walking his beat in the middle of the night, and he comes across a guy under a street lamp who's looking at the ground and moving from side to side, and the cop asks him what he's doing.
Znacie stary kawał o glinie, który na nocnym patrolu pod latarnią spotyka faceta, który patrzy w ziemię, chodząc w tę i z powrotem, więc gliniarz pyta go, co robi.