Unfortunately, that won't work. Oxygen masks only work up to a certain altitude, which is roughly the altitude where airliners cruise. At pressures lower than that, even pure oxygen isn't enough to sustain you.
You don't die instantaneously when exposed to vacuum, although it is pretty quick. I wonder if it would be possible to repressurize the tube (by blowing a big hole in it?) within 15 seconds or so.
You don't die instantaneously when exposed to vacuum, although it is pretty quick. I wonder if it would be possible to repressurize the tube (by blowing a big hole in it?) within 15 seconds or so.