Some years ago a local box factory had a truck at the dock loading. It was built so there was a forklift ramp on the inside coming up straight into the truck. The trucker driver thought the loading was complete and he pulled forward to shut the doors, just as the forklift driver came up the ramp with the last pallet. It was a big pallet and he couldn't see around it so he drove off the dock. He got banged up pretty bad.
They needed one of those with a lock...and the key in the forklift drivers pocket.
