Two of the Internet’s most notorious goofballs are at it again. The Slow Mo Guys, whom we last saw stuffing themselves into a giant exploding water balloon, are back with new video in which they film themselves swatting at large mounts of Jello with a tennis rack in slow motion at 2,500 frames per second.

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It takes them a few swings to really perfect their technique but once they get good at it they produce some really stunning footage of Jello (or “jelly” as they call it in the U.K.) being sliced into tiny strips — as they describe it, it’s a really efficient way to manufacture gummy worms. Check out the whole thing below.