Everyone loves a good party trick, but it's even better when the trick is fun for the whole family! Former NASA engineer Mark Rober first went viral with his hilarious watermelon smoothie hack, and now he's back with another watermelon trick that's sure to wow your friends and family. He begins with two watermelons that are a similar size and shape, and then shows us step by step how to "skin" a watermelon. After skinning the first watermelon, he carves out his second melon and places the skinned watermelon inside. When he's done, it looks like a seemingly normal watermelon—but when he pulls it apart it looks like he has super strength. The best part is that when the trick is over, everyone is left with a delicious summer treat to enjoy in the heat!