How much do Chinese love ping-pong? Well, in the Tiangong, there are ping-pong paddles floating around.
Kowalsky, having disappeared into the void twenty minutes earlier, re-appears very much alive and hitches a ride in the Tiangong escape capsule. He brought the vodka. Especially memorable for audiences at the Toronto International Film Festival, who were on the floor in hysterics.
At the opening of the film, when Kowalksi keeps trying to tell stories, and Houston points out that he's told them all before. Multiple times.
Stone trying to figure out the Shenzhou's control panel, which is made up of about a hundred buttons - all labelled in Chinese.