when/how to show humility

[Adam]

This is a tricky one. If your relationship with the coach is amicable enough already, you could bring it up in an already casual conversation. Chances are, this coach doesn't remember the play anyway (coaches can verify this or contradict it, as I'm only making a guess), and judging from the fact that he/she questioned it at the time, he knows you kicked it anyway.

Bringing it up risks giving the wrong impression.

I think I'd let it alone unless it somehow comes up naturally in conversation.