chuck wrench in the chuck
We had nothing at trade school for this, but at my apprenticeship if you started a lathe with the wrench in the chuck, you had to buy a round of beer for the entire shop.
And the apprentice lathe shop was like 25 lathes.
Yes this was a public "job " at the Danish national railways, you see many drunk or sleeping people there in a work day, and there was plenty of little shops around the place where you could buy beer / soda / ciggies and whatever.
I will admit that one Friday i had to take the bus home, CUZ i was too drunk to drive.
But that was also a X-mas lunch with 2 older guys mainly doing brake work on trains, we had all the traditional good X-mas food, and they only did the strong beers + then Snaps and so on.
6 hours of that and the world was spinning for this little guy ( i must have been around 20 then )
PS. a few did that wrench in chuck thing,,,,, not me of course i am just crazy but not insane.
PPS: coming out of that education after + 1/2 year which was customary to give the good apprentices, i stopped outside gate and swore a oath to myself that i would never again work for anything public / government, and i have of course kept that promise too.