My friend has so many sayings and little things he does that I can't help but grin when I think about them. One time he had filled his backpack with metal sheets just because he could and so I pressed down a little and he fell right over backwards! Just today he unscrewed a metal sheet from a door (I kept the sheet, he took the screws). We're such ne'er-do-wells.
Everyone has something that makes them smile when they think about it, be it a person's saying, something someone did, an event, a joke, anything. What makes you smile whenever you think about it or see it?