We had used several entanglement props and were seeing people getting too used to moving forward through the props. So we added a feature of allowing people to proceed through the prop with their mask clear and a darkened room. So they could see their destination and there the lines were as they proceeded.

But at the end of the hallway, we screwed in a 1/2" thick piece of plexiglass that was donated to us by a local windshield repair business. It's funny to see how many times people bump their heads into it before the surrender and try to back out of an entanglement prop. Not enough training is done to this end, IMHO.

Anyone have thoughts on this? Or other ways to improve it?