Dream Of Skateboarding Down Dangerous Freeway

I was looking at a freeway where there were some skateboaders going down it. I then found myself driving with my sister and two other friends but in seperate cars. We were getting onto this freeway from further back and as we go on the free way the on ramp went down into this tunnel-like underpass with multiple pillars I had to avoid and the. I had to quickly stop because it was a deadend. I had to back up a few feet and go out where it was open to the freeway. I was then in a skateboard and started descending as the freeway quickly went from flat to almost a 45 degree angle. It was one of the steepest things I've ever been on and I was skateboarding down it at high speeds. I was swerving a bit to try to slow my descent and them turned the board completely sideways to skid my way down and I was still going extremely fast. I remember the feeling of starting to float up and then bent down and leaned back so that I didn't fall because a fall on this concrete freeway at those speeds would have been bad. I remember the freeway being very wide, like 10 or more lanes across. I saw the bottom. Which is where the freeway abruptly ended in some small patch of grass. It was a little crowded with people so I skid in there avoid all others and as I hit the grass which was now flat ground I jumped off board and slowed my run as I avoided multiple concrete patches that would have torn me up if I hit them. I somehow successfully made it down and saw two girls there and said that that freeway is the most dangerous thing I've ever seen and they agreed and looked surprised I made it without a scratch. That patch of grass had concrete benches and became a path that lead into a beautiful park that overlooked a big city and the sun was beginning to set for the day.