Came across an old diary the other day so this incident came back very clearly.
A quiet Boxing day morning was shattered by a very loud bang which shook the house. Seconds later a guy comes running past our house screaming. When I got outside there were spats of blood the size of half-crowns every 2 feet all the way up from the block end and a spray of glass & debris outside No 28 - no sign of the guy. (He had actually taken refuge in no 17 because he knew she was a nurse).
Turns out the gas beneath the floorboards in the front room had exploded pushing all the boards to the ceiling demolishing the wall to the living room and burying Mr & Mrs Pike under a load of bricks but they escaped injury because the sofa blew forward with them!
The guy outside who had the bad luck of passing the window just when it happened came off worst, but I don't think he had anything worse than scars in the end.