Special Haircut

A blonde was rollerblading with her headphones on.  She stopped at a hair salon and asked for a haircut. She instructed that the hair stylist could not take off her headphones.
The stylist replied refusing to cut her hair, so she left.
She went to a different hair salon and said the same thing. This time, the stylist agreed to cut her hair.
After a while, the blonde fell asleep in the chair. The stylist took off the headphones and the blonde died on spot.
Confused about what happened, the stylist put on the headphones and she heard the recording say “breath in, breath out.”