I can't remember the exact number of takes it took, but we practiced for some time in my friend's backyard so we were already professionals.
Madness string 91991
And yet it still happens frequently enough that I have to put it in our shop's initial safety briefing. If they're running a machine, don't even fucking talk to them, stand off to the side and wait until they're done. Anyone who breaks this rule then has to watch lathe accident videos for a better understanding of why the rule exists.