I suppose any Glock slide/barrel assembly could be fired under similar circumstances, but I hesitate to discuss details, because then some dumb-arse would probably shoot himself or someone else while trying it. The fact that the gun would definitely fire during the early stages of disassembly, if left loaded, helps to discourage this (so don't try this at home, folks!).
It would require more effort than just pressing on one spot, though, with the firing pin block always passively locking the pin until moved. Not something that would happen by accident, in any case.