I'm going to break our friends glass door
Why would you break the glass door?
I was so fucking astonished when I imagined the huge mess he would have to clean up afterwards.
Being a mean friend is something you aspire to become. Doing this to his glass door is quite terrible, someone might get cut bad and need hospitalization. Do you really want all this on your conscience?
It's not my conscience.
I just don't think you should cause such destruction to your friends property for no reason. Why not just be civil instead?