Double Trouble- Dualism part two

"A drunk is staggering down the road when two nuns are walking in the opposite direction.

As the nuns approach him they wonder which way to walk to avoid him as he staggers. The road is busy so they can't walk off the pavement, so they decide to separate, with one going each side of him.

As they pass the drunk he stops. Then after a moment he turns around, stares at the nuns, and says:

"How the f__k did she do that?"

Thanfully nicked from Anticant's Burrow