Absolutely shocking. Its happened before, the 737 is one of the culprits, as is the worst of all, the Sabre. There has been some terrible accidents with LAME"S in QF as well, the worst being a engineer being decapitated by a Connie, and another killed when a armed door was opened in a hangar, and no need to tell what happened next, but he was crushed against the scaffolding. A terrible and timely warning to all who walk the apron.