Have you ever been playing a game around someone, or a group, who have never encountered anything more advanced then Pac-Man? I've found this to be very fun, especially when that person or persons show some kind of interest and ask questions :)
Two instances I remember being very fun...
The first was playing Bioshock with my mums friend in the room. It was the opening level, so she saw most of that, and asked after the story. Well... explaining Bioshocks plot without taking up an entire day is tough, but I managed to give her the basics (as in, she had a good enough idea of why peoples faces were so messed up, why they were violent, why everything was trashed and why I could fry a person with my mind)
And then we came to the point where the Little Sister is introduced... please note that the room was dark, cool, quiet, and the game was on a big screen with good sound. I explained to her how the Little Sisters worked, and she smartly asked "If they are full of Adam, what's to stop the Splicers from just kidnapping them?" I replied "The Big Daddies" She asked what they were.
You know this scene ^^ Splicer punches Little Sister, the screen shakes as a roar shakes the walls, a massive diving suit clad monster drops down, brushes aside a few pistol shots and then impales the Splicer with it's drill, turning it on full blast and tearing it's insides up. He then grabs him by the head, and slams him into a glass window, and from our perspective, into the tv screen, leaving his broken and bloodied bodied draped over the window sill.
My mothers friend is like O.O I go "That... is a Big Daddy" It was awesome.
The second time, I was using the big TV at the Hostel where I live. Most of the people there are older then me, broke, or just crazy/criminals. I was a little unsure of bringing my Xbox out, but I kept a close watch on it. A half a dozen people were watching the game (because there didn't seem to be anything better to do for them) and I could tell by their reactions that they had never even seen a 3D game before...
I booted up Fable 2, and when a dozen Bandits jumped me, I slammed on a Level 5 Slow Time, and moved from enemy to enemy, swinging my sword and leaving them all spinning on their heels or floating in mid-air. When time resumed, they fell all at once, and I formed a Fireball in my hand, turning on my heel and hurling it at another, forming another and throwing it to my side, then charging a massive Level 5 Fireball, and throwing it at the last group, which took down 4 people in one shot.
There was silence, my character standing there, surrounded by bodies, and there was a single Bandit creeping up behind me, sword raise. One of the people in the room yelled "LOOK OUT!!" and my character casually tossed his sword into the air, and then spun on his heel, grabbing the handle and killing the Bandit in one wide, fast stroke.
The person that had yelled without realising it actually cheered.