Later, back at HQ for Recurrent, an instructor brought my "event" up during ground school. I did my best, "there I was" and complained about how it did not stop spinning when I rolled it to idle. And he goes, "Idle? Why didn't you go all the way to cut-off?" He did not add the word, "dumbass" but he could have.
How many people practise going from idle to zilch (in a 206) with left hand only without diverting attention downwards to idle stop button? You get a chance to do that at shutdown but i doubt many people use the opportunity.