Put it at the start of the scene, before the reaction, so the van cue sets up what follows. Follow it with a bell ding as the door opens, then an air horn when the first person reaches the van.
Over dit geluid
This is a short, bright melody from a Swedish ice cream van, lasting just over a second, with a simple, tinkling tune that cuts through background noise. It feels cheerful and childlike at first, then faintly eerie and repetitive, like something heard from down the street. It is the Hemglass van tune, known in Sweden as Glassbilens melodi, tied to summer afternoons and childhood.