There is no promise of a laugh.  This is Bernard’s humour.

A neutron walks into a bar and orders a pint of best with a whiskey chaser.

“How much is that, my good man?” says the neutron.

“For you” says the barman, “No charge”.

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Two Atoms were walking down the road together chatting about life in general.  There was an almost inaudible ping.

One says to the other ” Did you hear that? I just dropped and electron.”

“Are you sure asks the other?”

“I am positive,” replies the first.

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Why don’t Heisenberg operators live in the suburbs?

Because they do not commute.

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Do you know what they put on the plaque outside Heisenberg‘s house?

“Heisenberg might have lived here”

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Why don’t you find photons in chapel?

Because they do not have mass.