Person B, the tall one in the relationship, holding objects high above their head just to watch a short Person A try to jump for it.
Person A kicking Person B in the shins to make them drop the thing.
Person A launching themselves off furniture to get the thing from Person B.
Person A waiting until Person B is asleep, then standing on the bed and pouring a cup of cold water on them from a great height while yelling “WHO’S THE TALL ONE NOW, FUCKER”