They reported she was "very agitated, crying, hyperventilating". The latter exited his machine hyperventilating and stammering. The child is extremely nervous and starts hyperventilating. However, by 09&colon;50, the crew was becoming listless, agitated, and hyperventilating. I'm kind of hyperventilating talking about it. This is why one can hold one's breath longer after hyperventilating than without hyperventilating. The normally unflappable Scarpetta finds herself hyperventilating and nearly shooting her own niece. My hands went stiff and I started hyperventilating. He was singing so high that he was hyperventilating. Michael happens on Helen hyperventilating and finds Colin's dead body in the bath.