Best key moment and why?

I'm not sure about a key moment, but one of my favorite moment comes when Greg is sent to drop off a toy donation at the Toy Drive bin outside the police station. He puts on a ski mask, so the police cannot identify him, and then swings by the church to see if anyone has left cash for him, shoveling the entire parking lot to make sure, but there is nothing there. The newspaper carries a story the next morning of an anonymous do-gooder who shoveled the school parking lot, enabling the soup kitchen to open. I find this to be a key moment because Greg never changes.... he's always ready to work a situation to his own benefit.