When I was but a wee(er) lad, I would do the Bryant College football camp. It was, at the time, the Patriots football camp. It was nice for me because it was strangely scheduled and would effectively sandwich between the two other camps I would attend each summer. Unlike the other camps, it was coached mostly by d-3 guys and patriots players trying to give something back. It was the "fun" camp for the fanboy aspect and one could let go when not trying to impress recruiters.
Anyway, when I was in 9th grade, Rohan Davey came to one of the camps. I was one of the kids in the offensive backs group, so I was included with the QB's when we'd get to talk to the pros. One of the kids there was a highschool quarterbacks and was getting heavily recruited by the coaches that were there as a junior. He was going into this newfangled offense called "the spread" and was pretty clueless about it. He asked Davey, and Davey was memorably clueless about reading technique and coverage. Just murmured a bit about QB mechanics and then asked if anyone wanted to guess how far he could throw a football.
Fast forward a year, and Kingsbury came to talk to the QB's, and us lower, non-throwing backs. The same kid asked Kingsbury the same question. Kingsbury grabbed a few kids from the group and positioned them defensively. He then grabbed a few kids and put them at receiver. He then intricately broke down playing technique, how to anticipate a defense off of the technique of a slot corner, how to bait a safety, and where to anticipate breaks. It was very impressive, yet shockingly easy to absorb. I wish I were a sentient being at the time because I could really have appreciated what a great coach he was going to be.