You think you see somebody you know walking out, so you start to wave to them, then you realize it's someone else, so you move your hand back at a weird angle and poke yourself in the eye, causing one of your contacts to fall out. You get down on your knees to search for the missing lens, then a child trips on your leg. They spill their milkshake on themselves and break into tears. Both the parents apologize to you and blame the child. You feel weird about it.