I'm not sure where to put this, but I think this would make a good trap
I think having a 'sticky trap' floor to place on other blocks would be neat. You could use it to slow down people walking over it, and maybe have an upgrade that makes people stuck until they jump or grapple out (allowing people to make 'flytraps' on the walls or just make people slow down a bit). I could even see a mod where the slowdown lasts for a small amount of time after touching it. I just think if raiders have a way to speed up and run fast, builders should have the opportunity to slow them down and trip them up.