These are two videos created by domino maze fanatic Hevesh5 demonstrating "the SONIVERSE technique," a domino maze technique that involves bricks falling in one direction, causing another brick hinged on top falls in the opposite direction. It's a little weird to see, like watching two dragonflies making love in midair. "And you've seen that before?" I've never been so jealous in my life.
Keep going for the videos, the second of which is an explanation and tutorial for how to reproduce the trick. PLEASE NOTE: The parts where the dominos stand back up were played in reverse and not an actual trick (although that would be amazing).
Thanks to Kristi, who agrees you're never too old to domino maze. Or pillow fort.