Thanks for all the responces.... I went to epcot yesterday and went on GM's Test Track. And in there show room, I saw a concept of there hydrogen Car which was really amazing. The GM Hy-Wire.
Also, if you can handle rollercoasters, You need to go On Mission: Space. It is the most amazing ride I have ever been on, it is not a rollercoaster, it simulates gforce, to take you from take off, to landing on mars. I have never been in space or have ever been in a spaceshuttle, or rocket. But this is the real thing, nothing will ever compare to this ride. The ride is about 10 min long, and you will feel really nautiouse<- spelling) the rest of the day. But Its def. worth it.