In the video, two men are sitting at a table with glasses of water in front of them. One of the men is holding a packet of Mentos and the other is holding a coin. The man with the Mentos pours the contents of the packet into one of the glasses of water, causing a chemical reaction that creates foam and bubbles. The man with the coin then flips it into the other glass of water, which also reacts with foam and bubbles. The men are laughing and enjoying the experiment.