Louisville hacker space lvl1.org (they describe it as “an open community lab and workshop”) figured out how to go Matilda on a Watermelon.

The stunt involved a Star Wars Force Trainer, a $130 toy that reads your brain’s alpha and beta waves via electroencephalography, then sets a fan in action when the EEG registers a state of calm in the user. By hooking the toy to a CO2 cannon, then sticking the cannon inside a watermelon, the creators were able to simulate Harry Potter-like telekinesis.

Start the video at about the 1:15 mark. The first part is just muffled instruction.