Careful, you could have someone's eye out with that

Last night I helped a friend cart a dismantled book case across London. This involved a bus to a tube, the tube across London, out of the tube, then a short walk to his new place, with the awkward, cumbersome shelves and units. We got a few odd looks, but we pay enough for the tube so we should be able to use it for such endeavours if we wish.

The first bus we boarded, as chance would have it, had a bus company official on as well as the driver, probably taking a freebie ride home, who told us we weren't allowed on as the wood 'constituted a health and safety risk' because it could 'kill someone' if it fell on them. The second driver didn't bat an eye lid.