Could she have decided to let me loose about the time I opened my helmet and screamed?

"You opened my helmet and left me with not enough breath."

There was no question of opening her helmet.

The cabin had pressurized and Paul was opening his helmet.

He opened his helmet for a moment and sniffed.

He tested the air in the lock, and opened his helmet.

"All right; but don't open your helmet until I tell you."

Everson realized that he had no choice but to open his helmet again.

Dr. Morton opened his helmet so that he could hear every sound.

Eventually he opened his helmet and went to the bridge.