No, Doors = Impossible to get out of while inflight. and yes! 10k! I knew it! I AM TEH WIN!
and I'd really like to see ANY general aviation plane climb from 10,000 up to 15,000 and back down in under 20 seconds. Hell, most hit ceiling at ~13,000 anyway. And even if they did, they'd be breaking the law once they passed 13k. Your only allowed half an hour without O2 between 10k and 13k. Above 13k its required for ANY length of time.
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When my flying days are over, and my death has come to pass
I hope they bury me upside down, so the whole damn world can kiss my ass