On: How often do plane stowaways fall from the sky?

[praptak]

I doubt that human lungs can withstand this much difference between inside and outside pressure. I haven't found the maximum non-harmful difference but a quick google found that maximum expiratory pressure in men is 97 cmH2O. This is only about 0.08 atm.

So I wouldn't count on the canister alone, unless it is connected to a full-body suit.