That's definitely a keeper! Love the attitude, and this is one of the few I prefer in B&W as opposed to color. You should consider saving this one to display at prom, wedding, etc etc
I like situations where one is prepared for an idea but a happy accident makes the better image! Kudos. Ditto on saving for an embarrassing (in a good way; I can hear the 'awww' from viewers at his wedding) slideshow.