Rotating blades of death
This is one of two revolving doors entering the University Union building. It is also a terror to navigate due to the high traffic and tight space. I’ve already fell over in it once and it really hurts and its all dirty.
There should probably be a minimum radius these doors need to be. I generally like revolving doors and think they’re a great idea to keep air spaces separated, while letting people through from both sides simultaneously. That’s what we in the computer industry call full-duplex :P
I think they should remove both doors and replace them with one of these babies: