So I found myself whistling a tune just now. Had no idea what it was, but it was catchy. Then it clicks. I run upstairs and dig out my gameboy (the classic green/black screen 80s edition) and sure enough, I was whistling the tune from Tetris. Not the main tune, but one of the alternatives. The one I always chose. Hadn't heard that tune in like 15 years. I guess a gazillion hours of playing that game left an impression. :D