Action timed to be slightly ahead of the audience adds an element of suspense and surprise; it keeps them guessing about what will happen next. An example of this is at the beginning of Luxo Jr. Dad is on-screen, alone and still; the audience believes they are looking at a plain inanimate lamp. Unexpectedly, a ball comes rolling in from off-screen. At this point, both Dad and the audience are confused. The audience’s interest is in what is to come next.