Looking at the picture of this incident, the thought that comes to mind is....
it is probably not a bad idea to be somewhat aware of the tailwheel aircraft taxiing around you and if there ever appears to be one approaching your position, be on alert to confirm their intentions and if there is even the slightest hint that they may not be aware of you, be prepared to get the heck out of the way.
Some Stearman History concerning Lloyd Stearman himself.....
"The tour was a two-week-long competition in which pilots flew from city to city throughout the Midwest. By the time it arrived in Wichita, on Aug. 13, 1926, Beech was so far ahead of the competition in the judging that only a serious breakdown could cost him victory - and his Stearman-designed Travel Air showed no signs of breaking down. Heralded by daily banner headlines in the Wichita Daily Eagle, the arrival of the Reliability Tour in Wichita should have been Stearman's finest hour. Yet the hour of Stearman's triumph became instead the hour of his life's greatest tragedy.
With Beech having won the Wichita leg of the Reliability Tour, Stearman took up a Travel Air and was performing stunts for the thousands of spectators, a practice that was common at each stop. When Stearman brought his plane down, he taxied along a roadway that served as a runway. Unknown to Stearman, one of Wichita's wealthiest and most prominent citizens, George Theis Jr., 64-year-old president of the Arkansas Valley Interurban Co., had parked his car on the runway to watch the flying. Theis' wife and two children saw Stearman's taxiing aircraft and moved out of the way. But Theis didn't see it, and Stearman's attention was focused elsewhere. When Stearman felt the left side of his aircraft hit something, he shut down his engine and noticed that his left wing had hit Theis' parked car. But the propeller had hit Theis, killing him instantly. His wife collapsed in shock. Stearman, too, was overcome, according to the next day's newspaper account: "When told he had killed a man, he collapsed and had to be lifted from the plane."