“Malo periculosam, libertatem quam quietam servitutem.”
Yeah, except they'd pass out cold in even a mild pull-up. Bummer.
Bail out! Bail out! Bail out! Or not...
Prone was tried in a lot of aircraft. From the Wright Brother's first plane to some of Nazi Germany's later planes. It works, somewhat. If you're trying to reduce the fuselage size, it's one of the ways of doing it.
Their main prop fighters, Bf109 and FW190, had notably reclined seats for increased G-force resistance. None of the Allied forces bothered with it, apparently.
Hope it had enough rudder throw to overcome asymmetric thrust with one engine out.