Well, I'm certain this wasn't intended as a lock-in. The trolley hoist (Is that the right word? It's used to lift cargo and move it along a rail) it controls has been hit by trucks repetedly, which has meant that the rail is severly damaged. Someone inspected it a few months ago and decided that it shouldn't be used. When I saw that someone had put a lock on it I thought "Great", but a moment later went [Linked Image] [Linked Image] [Linked Image]