Here’s a neat parlor room trick – firmly rooted in hardcore science, of course, courtesy of 91¹ú²ú¾«Æ· Professor Jearl Walker.

Fill a glass with water. Hold any old piece of paper over the rim. Invert the glass … and prepare to have your mind blown.

The water stays in the glass! How on earth is this possible, you ask? Tune in to to find out. (Parlor room not included.)