This reminds me of one of the funniest things I've ever witnessed.
I was to meet a property owner to look at an apartment complex. When I rang the bell, and the door opened, an obviously-inebriated dude was standing there, with a super-sized go-cup in one hand and a burning cigarette in the other. I said, "Hi, I'm mikejm," and stuck out my hand to shake.
He looked at my hand, then stuck his cigarette in his mouth and started to reach out with his (recently vacated) left hand. As he realized it was the "wrong" hand I could see the confusion in his eyes.
Stopping halfway to the handshake, he switched his go-cup from his right hand to his left, and then, rather than reaching out to shake hands, he grabbed the cigarette out of his mouth again, this time with his right hand. Then he (honest to gawd) stuck the cig back in his mouth, switched the go-cup to the right hand and reached with his left again to shake my hand!
He went back and forth a couple of times more. Finally he just nodded at me and said, "Yeah. Good to meet you."