How do you make water stay in an upside-down glass? | Science Week

Throughout Science Week, Dr Jennifer Cleary wows 2FM DJs with a series of fun science experiments.
Here, she shows Chris and Ciara that you can make water stay in a glass even when you turn it upside down! All with the help of a small piece of card. For the the science behind it see www.rte.ie/scienceweek