Strange dreams, riding on lift...

I've had 2 dreams this week where one certain scene is almost the same. There was only 1 night between the dreams.

1st: I was in a big unknown city with my friends and sister. I don't bother telling the whole dream, but there was a sequence where I was in a very high building with one of my friends. We decided to go down and I was going to use the stairs, when my friend told me: "Are you nuts?! There are lifts here." So we took a lift. The moment my friend pushed the button, it started to go down really fast, like a free fall. I barely touched the ground with my feet. It was scary. I felt like falling extremely fast. :shock:

2nd: I was about to go to London with my family. We were in airport and had to use lift. So I went into the lift and found myself with couple of my classmates. One of them pushed the button. At the same time I recognized we were in 31st floor O.O.....so the lift started to go down and again, it went on a free fall, but this time, it was also shaking. My classmates started to panic and I held on to the railing to not fall. One of my classmates fell and then it stopped. We were on 2nd floor and they went out. I had to go to 1st floor. So it closed and I was so scared that something terrible is going to happen again. I firmly held on to the railing and I felt uptight. It went down really fast, but didn't shake. So I finally got out of the lift and found my family who had gone with the lift before me. I asked my mom how their lift ride was. She said it was OK, kind of slow. I told them it was a total opposite with me, that mine was going down really fast. And at that moment I remembered that I've had this kind of incident before too, with the lift ( from the 1st dream). But of course I didn't think it was a dream, you know.

Oh well, I was wondering what they could mean. I haven't had so strange dreams in a while and they were very vivid ones.