Handshake if they owe me moneys.
"Hey, how are you? "(handshake)
"OW-OW-STOP SIFU-OW..!"
"You're late on your tuition..."
ok, so I'm 16/17 trs old and taking TKD and Hapkido.
My teacher when he taught techniques from a handshake, would always offer his hand and say,"How ah yoo..?" (Korean accent)
and then bend you into a screaming pretzel.
One day, I'm waiting for my Mom to pick me up from class outside of Sabumnim's office, and a guy walks in, apparently a long time student..who's been recently absent.
-and I hear this:
"Hi Sabumnim."
"Paul! Rong time no see! How ah yoo...?"
"OW-OW-OW-AHHH"
I look in and Sabumnim is sitting at his desk, and has this guy in a wristlock bent over backwards across the desk, writhing in agony. Sitting there he calmly says to him,
"How come you no come to crass..?"
Old school rocks!