Place it as the final beat of a short failed-plan sequence, after the setup has shown the problem clearly, then follow it with awkward crickets for the reaction that follows. If the scene needs a laugh instead, put a short thief's giggle after it and let that close the edit.
Sobre este som
This is a short, roughly two-and-a-half-second voice clip of Marcio, known as Ze Tolo, saying the Portuguese phrase 'nada desta vida' in a flat, dismissive tone. It lands as a deadpan shrug, funny because it treats a whole situation as not worth worrying about. The line is associated with Marcio himself, whose nickname gives the clip its title.