Ballooning over Austin

Ellen and I were out bike riding, and I heard a dull low hiss from overhead. I stop and look up, and this guy is maybe 100 feet over our heads, riding the flames pretty hard.

I guess he hit a downdraft. By a few blocks later, he was several hundred feet higher; high enough that we could still hear him, but there was a 1-second delay between seeing the flame and hearing it.