I'll share something. This happened in my final semester of nursing school (preceptorship). Seems like pre-nursing school was so long ago, I can hardly remember.
Here we go:
I precepted in Medical ICU. My assigned preceptor was totally awesome. One day she had to float, so I worked with a temp.
Him: "Do you know the difference b/w novice and expert nurse?"
Me: "other than the obvious.... no I don't. please share" (I was expecting to hear some secret)
Him: "expert nurses can HIDE their mistakes REALLY well. novice nurses don't have that SKILL yet." (emphasis intended)
umm.... really?

I was so glad he wasn't my preceptor.