That is awesome. Here's my comparable happy memory. Boot camp, 1976. Bout a week from the end, we're doing PT testing. I can never do the run, dodge and jump. I can run and dodge, but my brain says "the jump is 5' across. You're 5' tall. This is not doable."
The drill sgt says "You fail this, you fail basic. You will do it all over again."
Well, hell dude! No need to be harsh. Suddenly, I can leap five feet in a single bound! Twice.
Basic complete.
I can not climb ropes well. In Boot camp I was stuck at an obstacle where you climb a rope, crawl up onto a log beam run across logs climb a ladder and then come down a rope.
My CO ( commanding officer) suddenly showed up. I had failed the rope climb about 5 times by that point. 2 other recruits were struggling on their first attempt.
He shouted at them he would fail them if they did not climb the rope. Suddenly I scrambled up the rope and over the log. LOL.
But it doesn't end there. At the top you are about3 stories up, I am terrified of heights. You have to reach out and grab the rope then swing out and climb down. I couldn't get up the nerve to reach out for the rope. The CO was screaming at me as were a couple Drill Instructors. The CO finally reached out and demonstrated how it was safe to swing out. I still couldn't do it. Then he said disgusted like. " Fine go down the ladder and quit"
I was embarrassed by his disdain and so I reached out took the rope and swung out. Of course as tired as my arms were the climb down was no fun.