This got everyone's full & undivided attention. Catastrophic engine failure on a 767 - it isn't often you see pieces of one motor sticking out of another one.

The disc went through the aircraft into the OTHER engine, during a ground-run at LAX, when a GE CF6 in the number one position let go on an American Airlines 767.

Two taxiways were closed while bits of disc were retrieved. Attached are some photos, one of which shows half a disc sticking out of an engine.

In fact, the disc belongs to the other engine - it's passed through the center wing box and embedded itself.

Undoubtedly, this would have brought down the aircraft had this happened in service. The rear fuselage and port inboard flaps were toasted as combustor exit gases escaped and hit the airframe.