Had a OVERNIGHT DELAY in Zurich in 2001 on a company business trip.
Plane had a fuel leak when we were SITTING ON THE TARMAC READY FOR TAKEOFF!
Plane pilots behind us reported smoke to the tower and we were suddenly surrounded by fire engines and they foamed the plane!...............
Many years ago, I was on a plane that ran over a baggage cart while pulling out to taxi to the runway & messed up a tire. We could more or less see out the window - watched the crumpled cart dragged away. I think that delay was an hour to an hour & a half at least. Even though we knew the issue, the “natives were getting restless” on that plane.