My #McNaMoment was our first season at Philly when he scored his first screamer.
He hadn't played all that much and when he did, he looked awkward and slow and my roommate at the time and I were absolutely hating on him. We were incredulous (I'm not completely certain that is the correct use of that word, but I really don't care) when he decided to launch a shot way outside the box and then didn't know how to react when he put it in the upper right corner. We didn't really celebrate the goal, just kind of sat there on our couch in shock.
So glad he's proven me wrong with his play over the last two years.
And another great #McNaMoment was anytime last year he would get the ball, we would yell out "DAD!", because TMac just looks unathletic and just generic "dad-like". We got several weird looks from others in 237 when we would yell that out.