This is a glitch which has annoyed me to the point of not playing it anymore. It happens on other levels, but the most common level is Unusual Suspects. The mortals keep getting stuck in one place and keep turning in place as if they're fused to that small square block. It's usually in places like doorways and especially when leaving the prison, but it can happen in almost any place.

Has anything experiences this glitch and is there any way to fix it? I find someone else walking into them can get them moving again, but its not always possiblr to do that.