Annoying teacher !!! thanx!

in last weeks tutorial our teach got another teacher to help the students coz its hard with one teacher only ..
so this teacher was arabic but he was so RUDE and MEAN especially to me I dont know why ! his tone was so nasty !
I asked him for help and he was like ( read the question ...) I read it , then he was like ( THINK) with that really bad tone .. so I told him I thought of it and I didnt know thats why Im asking u DOCTOR .. he was like u took this in the class u are supposed to know it ,gave me his back and left! I was like what da heck :S !!!
and everytime I call him he used todo the same thing . so finally when he thought of helping me the question has a root and I Didnt notice that it was a negitive intger .. he asked me whats the root ? so I grabbed my calculater and wanted to calculate it when he pulled it off my hand and banged it on the desk and shouted : WHATS THE ROOT!!! .. I was so shocked coz he did that infront of all the students and made everyone look at me so I like ..OH its a negitive intger ! its un defined .. he was like FINE NOW THINK MORE and turned his back and left :S !!
after 30 minutes I asked my teacher for help and refused and help from the other teacher .. my teacher in 5 secounds made the question so clear for me :S!

what kind of teachers is that :S !