Because physics are fun, this is a video of science experimenter NightHawkInLight creating a glow-in-the-dark pendulum swing using metal nuts (like Optimus Prime’s) covered in fluorescent paint and hanging from different lengths of wire under a blacklight. The results are hypnotizing, and I wouldn’t be the least bit surprised if you said the secret word right now that I’d strip down to my short leg boxer briefs and run down the street. Well? Go on — say it. “It’s no fun if you want to.” Come on, I’ll just run and touch that far mailbox and gallop back.

Keep going for the video, but the real fun begins around 3:45.