It was in the backyard of my parents' house, but it wasn't QUITE their backyard. Much bigger in scale. It was also, in the dream, my aunt and uncle's backyard rather than my parents'.
It must have been the fourth of july, because as a special treat after a lot of weirdness I don't remember now, they broke out fireworks.
Which included a fountainlike cone which shot off a long even stream of sparks while singing lounge music.
Really gruesome lounge music.
And then I was awake.