Stephen built an escape room doomsday device as the final timer for escape. Behold the “ST3-v3 Black Tip Missile… an Escape Room Doomsday Device”!
It’s built mainly of PVC, with wooden fins. It can be hung from the ceiling or the “bottom of an aircraft wing”.
When the countdown timer expires, the added stereo speaker “fires” and the tail lights up as if it’s launching. Great job, Stephen!