I'm a school bus driver.
A couple of years ago I had a group of kindergarden boys in the front of the bus who were making fart noises. After a while I said "Enough with the flatulence noises." and eventually got them to stop. Next morning they were back to the same thing. Evidentally I wasn't the only one who had tired of the game because another of my 5 year olds yelled out "Enough with the flatulence noises."
I love my job!