I don't think I've said it, but have heard about all of 'em - Merry Christmas, there ya go, gift wrapped it for ya, etc. etc. etc.
If I scratch and give up BIH, I usually say something stupid - "sure, all my shots in the side titty out, but the cue goes straight in" or "has that pocket always been there?" .... something like that, but then again I don't usually say that to my opponent. It's just something I blurt out loud to keep myself from doing something in anger (at myself). Beats kicking something, whacking yourself in the face with your cue, throwing the cueball thru the nearest window, etc. lol
I did have a guy in league once that liked to do the whole MERRY CHRISTMAS thing, and he was loud and talkative in every match he played.....I was ready when he scratched against me....MERRY CHRISTMAS he says, and with no hesitation, and just as loud, I said, HAPPY NEW YEAR! :grin: