I was once taking a class with Csaba Szabo in Hungary, who, as usual, was writing furiously on the board, when the quietest student in the class raised her hand

I was once taking a class with Csaba Szabo in Hungary, who, as usual, was writing furiously on the board, when the quietest student in the class raised her hand. Without turning around, Csaba yells, 'YES, QUESTION?!' The girl says, 'Csaba, what's going on with you? You're always yelling, you slam the boards down, throw chalk constantly... Last week you even broke a window? Why are you so angry?' Csaba responds, 'Yes, yes, angry always. A storm is coming, and algebra is the thunder!'