Hey, guys, did we ever learn exactly why Sirius slashed up the Fat Lady's portrait in PoA? Peeves said "He has a temper," but I don't believe Sirius would hack up the portrait just out of irritation. Was he trying to stab Peter at the time and hit the portrait instead? Did PETER actually do it, to frame Sirius for yet another thing he didn't actually do? Or was Sirius really mad enough at the Fat Lady that he cut her picture?