When I was going from black to brown this inexperienced hairstylist put three processes of bleach on my hair and left me under a DRYER for fourty minutes. I didn't really know any better so I didn't stop her so when she pulled of my cap my hair was like tendrels of stretchy yarn. I had to pretty much shave my head and wear a bandana for about four months. It scarred me for a long time.
but yeah, it sucks.