I agree completely. The reported cause of this crash is pure fantasy. You don't simply stall a Lazair at 500' and perish in an unrecoverable dive.
Lazair Crash in Aviation Safety Letter from Transport Canada. 02.2004 A
Stall at Pattern Altitude Claims Another Life
The pilot of a Lazair ultralight aircraft had taken off to practice touch and go. He was proceeding on a wide left-hand circuit downwind for landing. He had been sequenced number one and as he turned base, witnesses heard both engines stop. The aircraft continued on what looked like a power-off glide back to the airport. As the aircraft approached final, the wings were seen to rock from side to side. The aircraft then nosed over to about a 90° angle and the pilot was unable to recover from the dive, even though the altitude from which it was begun was reported to be close to 500 ft.