The clip comes from Vine, the six-second video app where the I'm in me mum's car moment became a widely shared meme. The original video shows a boy in the back seat of his mother's car imitating driving noises while an adult tells him to get out, ending on his deflated awwwww. It spread through Vine compilations and YouTube reuploads, then lived on as a soundboard staple. Creators still use it for driving jokes because the setup and punchline fit neatly into a few seconds.
About this sound
The Vine audio of a boy chanting I'm in me mum's car, broom broom, until a man shouts get out. A meme sound for driving jokes and fail edits.
This is the audio from a classic Vine in which a young boy sits in the back seat pretending to drive, repeating I'm in me mum's car and making broom broom engine noises in a cheerful, singsong voice. After a few seconds an adult male voice cuts in with a loud, gruff get out me car, and the boy's excitement collapses into a long disappointed awwwww. The contrast between the playful engine sounds and the sudden scolding is what makes it funny, and the clip's short length makes the punchline land fast for viewers who remember the original meme.