I had some barber college haircuts when I was a teenager. They were definitely cheap, and sometimes good. But then there were those times when we'd be about two-thirds of the way through the haircut, and the student would just freeze, with a blank/scared look on her face. Then she would say something like, "Um... I'll be right back..."
She would go get the superviser, and that's when the real teaching and learning began!
Teacher tries to reassure me, assess the damage, encourage the student and keep the whole thing moving so they can get the next cheap bastard in the chair.
A few weeks of extra product and careful hat placement and the damage worked itself out.