It didn't happen to me, but...(sort of a train story)
When I worked at the phone company, a new batch of bucket trucks was delivered. The manufacturer must have estimated the height of the workers in the buckets at 5'2" because when splicers who were about 6' and taller strapped ourselves in, the height of the bucket was such that we felt we were about to fall out if we leaned too far out.
A safety inspector concurred, and the manufacturer sent a fiberglass expert to the garage, equipped with 4" high extensions that he bolted onto the top of each bucket, making them taller and safer.
Some of us had tested the new trucks to see if they would fit under certain of the low-underpasses of the LIRR in the East Hampton area. They fit perfectly, with very little clearance to spare. Then the bad news came in. One of the guys had cleanly sliced off one of the new bucket extensions, along with the entire bucket and parts of the boom, forgetting that his bucket was now 4" higher.