Once was worth trying; twice is wasting oxygen.

He needed to strike a balance between using up fuel in a fast tail chase and wasting precious time and oxygen on a lengthy chase.

Remember how Aivas keeps reminding us we can't waste oxygen.

"Doesn't it waste oxygen?"

"Your tiny hand is sweating, let me-" "You can't sing, George, and you're wasting oxygen."

Stop talking," Simeon ordered, "you're wasting oxygen.

But as far as Hirst is concerned, who sadly is still wasting valuable oxygen, it's less of a knee-jerk response, and more of a gag reflex...

He was someone 'who just wastes oxygen.'

The oxygen flowrate is critical; too little will make a slow ragged cut, while too much will waste oxygen and produce a wide concave cut.