Page "Pusher configuration" Paragraph 97

: Engine location in the pusher configuration might endanger the aircraft's occupants in a crash or crash-landing.

If the engine is placed behind the cabin, it may drive forward under its own momentum during a crash, entering the cabin and injuring the occupants.

Conversely, if the engine is placed in front of the cabin, it might act as a battering ram and plow through obstacles in the airplane's path, providing an additional measure of safety.