Very good.

Quote Originally Posted by Chuvak
Quote Originally Posted by basurero
Next story:

After this unfortunate event, the man decided that he should change his life. So he went to an anger management class in order to learn how to restrain the burning rage which used to frequently explode within him. At his first class however, his teacher called him a "fatso" and he instantly got angry/flew into a rage and chucked him out of the classroom's window (better: classroom window). The man landed in a prickly bush. (He tried to call the police but noone could hear him because he had pricked his tongue and it didnt work properly. He endeavoured to stand up, but at that very moment he felt a pot land on his head. He fainted and hasn't recovered as of yet/yet!!!)
About 15 mistakes.
Note, there were somethings you changed which were not incorrect to start with, or that you changed in an way I didn't expect. The way you said is correct too though.

that he ought to change his ways

to learn how to restrain the burning rage which would quite frequently explode within him