Most of these aircraft seem to be low wing, with an upward, forward opening canopy. I have been asking friends who own/fly them how they would get out if they flipped over on landing & it seems as though very few have even considered the prospect. I asked one guy if he had an axe or similar on board & he thought it was totally unnecessary. "It is so light I could just lift it off me" was his thought. Seems that that is not the case -
Two people freed from flipped small aircraft at Starke Airfield in Townsville - ABC News (Australian Broadcasting Corporation)