We broke major safety rules doing the opposite. Carrying various steel tanks up stairs that were way too heavy for two, under-gymed, college students, one step at a time, resting the tank on every step while half of it cantilevered over the edge, as we hand-stabilized it...

I wanted to avoid thinking about that failure mode where you accidentally cleave some part of the gas regulator by damaging it, and that turns the tank into a cold-gas rocket motor. We were shown pictures of the aftermath of those lab accidents—I think there was one were a tank embedded itself into a ceiling?

edit: Now I remember the follow-up—after a professor witnessed us, they showed us the correct method. It was simply to send the tank up in the elevator unattended—one undergrad pushing the "up" button and stepping out, the other waiting for it on the destination floor. Stupidly simple.