Over the years, some of the trapped baggage handlers do make it airborne. It is not uncommon to have someone nap in the cargo hold while waiting for the last bags.
Eastern had a case in MIA in the late 80's as I recall.
FedEx had a loader accidentally ride in the hold of a 727 a few years ago and the company dispatched a corporate jet to retrieve him.
UPS had a loader accidentally cross the Pacific in a 747 a while back I'm told.