Getting the lucid key

To start with: Yay, I've had my first lucid experience while knowing I have :D

The story:
Ok, I was going to bed to sleep. I just had my first school day since a two week lasting vacation. So in my dream (not lucid), I was cycling to school. And at about half way there, I was passing a guy. I asked him if he was a lucid dreamer. He directly took me to a playing ground and there was a building on it, as well as all the standard playing stuff. It was a 2 meter * 2 meter * 2 meter steel box with a metal door in it. It was totally gray. I "knew" it from when I was small and always playing there, sometimes some guys went in and went out after some hours. "We" (my child "friends") always tried to get in. It never succeeded. But this guy (he was about 18-20 years old) gave me the key. The key to get in. He opened the door. There was a wooden box in is that was as wide as the metal building/box itself , about 75 cm deep and 1 meter high. There was a wooden door in it at the front, about 50 cm high, 50 cm wide. He told me "it" all happened in here. Was this the Lucid Dreaming Box?

Next night. I got a lucid dream. Well, it didn't start like a lucid dream. I was looking at a cuddle. It was mostly white and also had some strange, hard, small black spots on it (a bit like drops of plastic). I say it quite clear (more clear than the dream the night before) (as clear as in reality, but I didn't have a very wide view). Then, suddenly, I realized this was a dream. I became lucid and the view and stuff was all as realistic as in real life. I was in the living room. I looked to the wall, the wallpaper was perfect. I don't know how stuff went then, but I do remember getting a car at some sort of dump station. Then the recall was ok again. I started driving (without a license :D). It didn't actually go well. It was more like GTA :P. So I got off the car and went to the beach (it was beside the road). Then I was about to play a game (I don't remember what game). But the beach owner offered me a different game. It was in the water.

Then I woke up. I knew all you guys having a FA, so I did some reality checks. I remembered first having a dream and then wake up, couldn't remember staying asleep but could remember waking up (my lucid dream was unstable so that was quite possible (I couldn't think a lot and communicating was hard (I now remember you have to use telepathy etc for communicating))). The time on my alarm was normal (red light as it should be, 5 hours in the night (can't remember the minutes)), nose RC was negative. So I was really awake. Darn! I went sleeping with the thought "let's finish my dream".

and so I did. I was there, in the same position again. There was kind of a plastic box filled with 2/3 air and 1/3 fluid, the weight of the fluid was depending on the type of fluid you'd take. My sister was about to play the game with me. The owner of the beach told me that it'd be connected to a speed boat and that you had to try to stay on it as long as possible. I thought "I don't want to get wet", but a few seconds later I realized that it was just a dream and it was no problem to get wet. Did I lose lucidity before that thought? I don't know.
So I took the heaviest box. My sister suddenly said "No, I don't want to get wet". That was quite frustating, so I woke up again.

There was a different dream after that, but I can't remember that anymore.

PS: this was kinda the first time I was having a dream in first person. Other dreams were more fantasy third person thoughts.


Question: has anyone else experienced literally getting the key to lucid dreaming?