Is ripping through a membrane good for attitude control? Asking for a friend. I wonder if their was enough of a pressure difference that the sudden pressurization of the chamber housing the lever arm did some damage. I dunno, the membrane isn't being aggressively sucked into the chamber, so far as I can tell. So yeah they definitely haven't solved the system-of-interlocks problem they'll need for the exit tube, then. There's no way you can use a membrane for full speed/power. Even if you find some magical membrane able to withstand the required pressure difference but still break gracefully, if that lever arm sees 1 atmosphere doing Mach 6, you're donezo. Like the whole facility. Ruined. Good luck. This shit is hilarious. Absolutely hilarious. There's a longer video in the article's comments that includes the phrase "I was skeptical at first". LOL "Then I heard Hanz Zimmer set to a tumbling hunk of lead, and I knew the world was changed forever".