Headphone Haircut

A blonde gets her haircut while wearing a pair of headphones. The hairdresser asks her to take them off, but she protests that she'll die without them.The hairdresser sighs, and starts cutting the hair around the headphones. Soon, the blonde falls asleep, and the hairdresser removes the headphones. A few minutes later, the blonde collapses, dead on the floor. Alarmed, the hairdresser puts the headphones to his ear and hears, "Breathe in. Breathe out."