Helium walks into a bar and orders some beer. The bartender says, "Sorry, we don't serve noble gases here." Helium doesn't react.
A superconductor walks into a bar. The bartender says "we don't serve superconductors here." The superconductor leaves without putting up any resistance.
A parasite walks into a bar. The bartender says "we don't serve your kind in here." The parasite says "well you're not a very good host."
A neutrino walks into a bar. The bartender says "we don't serve neutrinos in here." The neutrino says "I was just passing through."
A byte walks into a bar and orders a pint. Bartender asks him "What's wrong?" Byte says "Parity error." Bartender nods and says "Yeah, I thought you looked a bit off."
A higgs-boson walks into a church. The priest says "higgs-bosons aren't allowed in here." The higgs-boson says "but without me, how can you have mass?"
Schrodinger's cat walks into a bar and doesn't.
A tachyon walks into a bar. The bartender says "We don't serve your kind here." The tachyon replies "You did tomorrow."