This picture by Twitter user @HarrietTolputt says it all. A British Airways 747 sliced through a brick house at Johannesburg OR Tambo airport.
Looking at the proximity of the house, and the length of the wing that has gone in to the house, I am wondering “Why has this not happened before?” A house could not spring up overnight. Looks like the pilot took the wrong taxiway, an amateurish mistake one does not expect from the very professional and well trained pilots of British Airways.