miss A's Suzy and 2AM's Jo Kwon showed off their '4D' personalities.

Suzy tweeted a photo of herself hanging upside down out of a car window with the message, "Yeah. Sometimes I need to get my blood flowing." She was in a bizarre pose, hanging out side of the car window and looking somewhat like a very pretty ghost upside down.

Jo Kwon had his own 4D input when he replied, "Suzy, tell me whenever you need me. I'll become your endorphin keke." Seulong also added, "I really hope this isn't you."

Their silly conversation amused fans who were excited to find out that the JYP artists were friends as well.

[Thanks to everyone who sent in this tip!]