I'm in Vegas too.
Last night sounded like any number of fire bases I was on when a mojor holiday hit. I don't know where the neighbors got the stuff but it was big and awesome.
Went on for several hours in my 'hood.
Our family didn't shoot off fireworks this years.
We experimented with different types of powder lit off under pressure.
This makes the illegality of it a little more palitable. Whatever the kids wanted to blow up, we blew up, within reason.
The best was a creation using a sparkler with a duct-tape "envelope" very tightly wound around it. My youngest came up with that idea.