In the early 1970s I was a traveling salesman and I had a company provided vehicle. It was pretty nice, a Chevrolet Impala station wagon (with the dreaded clamshell rear tailgate).
It had a dreadful rattle in the driver’s side door. I took it to the dealer and asked them to fix it. They said rattles are not covered by the warranty. I agreed to pay for the repair.
When they found when they removed the door card was an empty beer can.
I said, “I know I agreed to pay for the repair, but I am not inclined to pay for the removal of the empty beer can.” The dealer agreed with me.
The mechanic said that in all likelihood a supervisor was walking the aisle in the factory and the worker had to hide the beer can in a hurry. The only place available was in the door.
Addendum: For those who are not familiar with the dreaded clamshell tailgate, this video shows the later model corrected for safe operation.
The earlier models allowed you to lower the bottom without first raising the top. If you did that and reached in to pull up the tailgate, your wrist or fingers would get guillotined by the inertia of the rising tailgate. Later models, which the YouTube is illustrating has a safety interlock that prevents raising the lower section while the top is in the closed position.
They also offered ones that were electrically operated and they were no more dangerous than the electric windows of that era (which also could break fingers).