Oh man, car labor. I am not touching that one!
So, these cranes…I can imagine them flying with swaddles of little auto tykes!
I know strange and then when the baby comes out instead of crying it’s a horn honking and the doctor has to smack the baby on the trunk if it does not beep its horn. 
But the crane is a better theory then mine.
YouAreAToy: Oh my! LOL! That is a veryyy strange thought…I have to say that I don’t think they come from the muffler though. 
And I believe baby cars can cry but I like that horn idea! 