A Quantum joke, because it is both funny and not funny at the same time.

An electron is speeding down the highway when a police patrolman pulls it over and says: "Did you realise you were doing exactly 88 mph? Sir**". The electron replies: "Oh thanks, no I am lost"

If you don't understand "Heisenberg's Uncertainty Principle" the wave function collapses to "unfunny".

** (because he is a British policeman)