Dick, at 9 year old: mastered his first quadruple backflip.
Jason, at 9 year old: smoked his first cigarette.
Tim, at 9 year old: managed to figure out Batman’s secret identity on his own.
Damian, at 9 year old: literally killed four room-sized demons with only a sword and his bare hands and enslaved a 5th demon instead of killing it merely out of pity.