Well...nobody's perfect...
I've got some pretty strange bits of advice in clinics from people who were further up the food chain than me! Just a reminder that while we may all know a lot, we probably don't know it all...and most people aren't 100% right 100% of the time.
I had one a few weeks ago at our local clinic. We were doing plate drills with a live pitcher, but no batter.
After I did my reps one of the instructors said, "You need to get down lower in your stance". Okay...so I asked him if my eyes should be at the top of the strike zone
He says yes...then I think it started to sink in. But just to drive my point home, I asked him how do I establish the top of the strike zone when there isn't a batter?