Chris said that one of the most common questions he gets is 'what happens when you cry in space?' He demonstrated himself crying in one video; we got to see that tears in space don't fall. The tears just kept collecting in a ball of water stuck to his face, with every tear the ball got bigger until half of his face was covered in water. Eventually he had to just wipe off the mass of tears with a towel.
Source: http://likes.com/tech/an-astronaut-teaches-us-about-space-in-gifs?pid=125317&page=5&v=eyJjbGlja19pZCI6IDIzMDg5NzE0NjksICJwb3N0X2lkIjogMjgzMTY5MzMsICJjIjogImZhY2Vib29rIn0
Source: http://likes.com/tech/an-astronaut-teaches-us-about-space-in-gifs?pid=125317&page=5&v=eyJjbGlja19pZCI6IDIzMDg5NzE0NjksICJwb3N0X2lkIjogMjgzMTY5MzMsICJjIjogImZhY2Vib29rIn0