Not long after being released from the hospital, Leo decided to become a hot air balloon parachutist. His job required him to grab a trapeze attached to a parachute, itself attached to the ascending balloon. During one ascension, the rising balloon drug Leo across the kerosene stove used to inflate the balloon. Spilled kerosene soaked his shirt; a spark from the stove set him on fire. Too high to let go of the trapeze, he held on until he reached an altitude sufficient to pull the parachute's rip cord, burning all the while.
Recovered from his burns, Leo chose a more conservative vocation. He took up dirt track auto racing at county fairs but quickly discovered that pilots who performed at the fairs in their biplanes received a higher salary. As a former Army flight instruction, he lost no time returning to the cockpit and soon became a well-respected movie stunt pilot. One movie job that didn't end well for Leo took place on the set of De Mille's film, Manslaughter in 1922. Leo doubled for star Leatrice Joy who causes the death of a motorcycle officer as she flees from prosecution. The scene called for Leo to spin Joy's car, stopping it in the middle of the road so the officer would crash into it. When the original motorcycle stuntman realized how dangerous the stunt was, Leo volunteered to do both stunts. The short story - Leo hit the car with enough speed to be thrown over it and land on the mattresses. Yes, he missed the mattresses, breaking a collar bone and adding another gash to his head.
Leo stuck with flying stunts after his last earthly miscalculation. Clover Field was his home base where he mentored Moye Stephens. He would die while stunting in Sky Bride (1932). This was due to an error on the ground - not pilot error. More of Leo's story can be found in Flying Carpets, Flying Wings as well as several on-line sites.