I absolutely love that song. My ex-husband used to sing it to my son.(Maybe he wasn't all bad) I don't remember it going like that though. Is it possible that someone heard him do it once and wrote down these lyrics. We definitly sang the "Horn goes beep, beep" line. Maybe it was done differently every time he did it.
We also used to sing it with
You can sit in the front seat, You can sit in the back seat, front seat, back seat, While riding in my car.
Horn goes beep, beep. (3 times) While riding in my car.
Fun song to sing with kids. And you can make up all kinds of words, each taking a turn.
Thanks for reminding me of this. I'll introduce it to my grand kids.