More jokes from http://quantumfactory.wordpress.com/2011/02/23/schrodingers-cat-walks-into-a-bar/
Helium walks into a bar and orders a beer. The bar-tender says "we don't serve noble gases in here." The helium doesn't react.
A neutrino walks into a bar. The bar-tender says "we don't serve neutrinos in here." The neutrino replies "I was just passing through."
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?"