You know that game we used to play as kids when you're giving someone a high five.
High five! On the side! Down low! Too slow! (while pulling hand away so the other guy misses).
We were at a basketball game over the weekend and one of the Fathers started playing this game with Emmy. Emmy smacked his hand down low. So the Father did it again, and Emmy smacked him again. After five smacks in a row (and Emmy waiting patiently for a sixth opportunity), the father looks at me with a sheepish grin and says "Your kid is pretty quick".