I had a co-worker who was using the turnstiles to a classified facility. They are designed as cages in ‘certain situations’, his card let him in and then locked him in the turnstile.
As he told me later on four sets of M-4’s pointed at his head made him a bit ‘nervous’. It turned out to be a data base ‘error’.
Sure am glad I don’t work there anymore.
Since the guards saw me every day and knew that I didn't have a weapon (the metal detector would have gone crazy if you even had on a belt), they let me back out onto the unsecure side and said "what did you do?
Database error, couple of hours waiting for it to get straightened out. Had to wait until the next day to get back in, took a pretty good hazing when i got there.
But the guards were very professional and did not overreact in the least.