More than 200 rocket hobbyists gathered in the Nevada desert to see if their ideas would fly.
Organizer Matt Clark of Glendale, Arizona, says the amateur rocketeers get instant feedback.
He notes either the rockets lift-off, or a year's worth of work gets blown into tiny, burning pieces.
One group planned to combine their two favorites -- beer and rockets.
They want to launch a full beer keg two miles high.