Blonde haircut

A Blonde goes to a barber and asks for a haircut. The barber asks her to take off her headphones, and she says she needs them and can't take them off. As he starts to cut her hair, she falls asleep in the chair. The barber can't cut her hair correctly with the earphones on, so he removes them, and after 30 seconds she drops dead. Startled by what’s happened, he picks up the earphones to listen what it was and they said: "Breath in, breath out. Breath in, breath out..."