I'm going to take a guys spot when he wasn't there at a barber shop
What happened to make you do this?
I was waiting too long and that guy told he would be there later
I think that you should make sure that he doesn't want his spot anymore. It is rude to go ahead of him without making sure that that is play first.
I'm just pissed of waiting so long and I don't care.
If you don't like waiting cutting in line is still wrong. You know you can call ahead and make an appointment so you get the time slot you want when you want it.