An aeroplane such as the Flightstar Pioneer is NOT at all challenging to fly. I haven't flown this type but have flown 2 & single seat Thrusters, Drifters, Mustangs, Jeeps, Robinson B1RDs, Tyro's etc. They are generally viceless, stable and having high drag are difficult to accelerate to high airspeed. The stall is usually a mush and they don't usually drop a wing quickly due to greater dihedral than higher performance a/c. Pilot incapacitation or some exaggerated panic response (perhaps PIO) is likely.