I got up at around 4:30 this morning to photograph a hot air balloon launch for a client. The launch point was Mirabeau Park in Spokane, Valley, WA. A total of three balloons were present but only two flew. The third one was using a lot of propane to make a glows for a local news show and they didn’t want to fly without full tanks.
I got to ride in a hot air balloon last year and it was a very serene experience. You don’t hear anything up in the sky, except the occasionally roar of the propane tanks onboard.