What better way to salute the end of summer than to blast a few leftover watermelons into oblivion?
"We're going to see if we can see the round progress, and maybe slow down between each watermelon," Free says in the video.
What happens next gets captured in the video by two slow-motion cameras at 1,000 and 5,000 frames per second.
Bye, summer. Hello do-it-yourself science!