Too many to count:
Some that stand out though:
Playing Shark! Shark! for the Intellivision and the Jaws music comes on letting you know that the shark is coming
Renting an NES and Double Dragon 2 and staying home instead of going out to a concert.
Staying up all night playing Mario Kart 64 with a friend. Final score in battle: 101-100
More recently playing Fifa 06 on the DS and doing a bicycle kick, I was amazed that my did it on a handheld. I remember when it was a big deal on the Genesis.