Did you know?
According to the booklet for the original Super Mario Bros. the inhabitants of the mushroom kingdom were turned into stones, bricks and field horsehair plants by the invading koopa horde.
See here's the quote from the booklet:
"One day the kingdom of the peaceful mushroom people was invaded by the Koopa, a tribe of turtles famous for their black magic. The quiet, peace-loving Mushroom People were turned into mere stones, bricks and even field horsehair plants, and the Mushroom Kingdom fell into ruin."
So when you think about it that means that every time Mario breaks one of the bricks he actually murders one of the towns folk.