Less than an hour, I'd say. Forty minutes, give or take.

[ A remarkably short amount of time to get in trouble, no matter how you look at it. Anyway, despite the relative ridiculousness of the situation, Lambert seems to approach it more with a sardonic sense of humor than hysterics. It's nothing to panic over, just kind of stupid. ]

Some of that was spent changing altitude. This one used magic to operate air valves.