Put it at the reveal in a travel or theme park edit, after a slow build-up and before the action picks up, then follow it with cartoon chase music to keep the energy going, or add an MLG wow for a bigger reaction to the twist.
About this sound
The clip is a short, roughly five-second exchange in which a child asks when they will get to the ride, then another voice shouts that the escalator is the ride and lets out a gleeful yell. It feels funny and unexpectedly triumphant, like a dull wait suddenly becoming the main event. It comes from Fairly OddParents, in the Escalator Land scene.