My proudest MA moment would have to involve my daughter, Natalie. To become a shodan in her style (choi kwan do, not my own isshinryu) she had to break 2 boards with a reverse kick. Although she was a petite 14 year old, she had no problem the first time. That same day a woman of 35 going up for sandan tried the same kick on 3 boards 4 times before giving up and breaking 2.
While I'm not a big fan of CKD, it's too bad Natalie didn't stick with it. She was very fluid. IMHO she also had sneaky power due to Okinawan karate principles she picked up from the old man.