Sorry, I can't think of a Floyd joke. But I stole this from Jeff Goldstein:

My twentieth brief conversation with a McIntosh apple

me: “So, why did the apple cross the road...?”

apple:

me: “Give up? Because it’d been eaten by the chicken.”

apple:

me: “...who, y’know, then himself crossed the road, presumably...”

apple:

me: “...the chicken did.”

apple:

me: “..You don’t get it, do you?”

apple: “Oh, I get it. It’s figuring out how a dork like you managed to nab a mate and procreate that’s got me puzzled.”

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Activist != Expert.