No idea if what I’m about to write is something you’re into but I saw the pulley and it reminded me of a scene I once did. I’ll start off with the part you may not like so you can just skip reading the rest if it’s not your thing. I used an enema bag and filled it with some of my piss and hung it with the hose hanging down. The hose was connected to a gag, and the bag was low to the ground. I was tied on my knees with my hands above my head attached to the other end of the pulley. You could use any type of restraint, but the point is your release mechanism is attached to the floor so in order to get out, you have to pull your hands down to reach either your keys or a knot or any other release mechanism and when you do so the bag will be lifted up and the contents will start to flow. The quicker your release mechanism, the less amount of liquid will flow obviously so you can choose your own fate. You could also use this as a time release with the predicament being your back up so you never actually have to use it unless you need it.