Put it at the start of a night-time scene, before the sleeper reacts, then cut to a Vine Boom when the swat lands and misses, and finish with a SpongeBob Fail as they give up and hide under the covers.
About this sound
This seven-second clip is a thin, wavering mosquito whine circling close to an ear in a dark, quiet room, rising as it drifts nearer and dropping away before it returns again. It feels instantly irritating and a little unnerving, bringing back that half-asleep urge to swat at nothing and pull the covers up, which also makes it funny in a shared, familiar way.