When you first see this trick, you can't help but be impressed by how perfectly shaped the interior of a watermelon looks. But watch again and it all makes sense!

Former NASA engineer, Mark Rober, basically wins the cool uncle of the year award with his genius watermelon party trick. When his nieces and nephews see him pull apart the shell to reveal a perfectly smooth fruit, they were amazed.

See how he does it in the video below, then try it yourself!

This could be a great way to serve smaller melons at parties! Would you try this? Let us know below!

[h/t Popsugar]