well. I live in the country so I am fairly used to the sound of guns.
Not so used to the sounds of cars backfiring though.
So I'm wondering if the sound I just heard from my window a few streets away was a gunshot.
It sounded like it... and I live in Elephant and Castle, London - so it's not unlikely. Except that the gangs round here tend to favour knives.

What do car backfires sound like?

I'm not worried or scared.... just curious....