Most of the time I think I'm normal, but then something like this happens to me.
The most stupid argue I ever had:

My friend asked me to do math homework together, because of complexity. She couldn't understand the task (P.S: I was right! ).

She: No, there's something wrong. You're wrong. It won't be like this.
Me: I AM right. Think logically! It's only calculating probability. There's a lot of numbers, but if you look at those and at the task, you'll understand why we don't need to write down all of them.
She: No!
Me: Shut up, you asked me to do your homework, so shut the hell up and...
She: *raises pencil* Avada Keda...
Me: *rise my pencil faster* Expelliarmus!
She: *threw her pencil and makes scared face*
Me: You tried to kill me... you bitch! D: