Roller coaster and jumpingmachine is the car itself has a speed, and then take your body forward, the whole person is back.
过山车和跳楼机都是这个车本身有一个速度，然后带着你的身体往前冲，整个人属于后仰状态。
2
While I'm not sure "jumping off of buildings" is my top pick for a lucid dreaming activity - this project definitely seems worth a try. - The lucid dream machine.
我并不确定“从高楼上跳下”是我在做清醒梦的时候最先想要做的事情，不过我想一定值得一试。
3
Because the machine is equipped with jumping mechanism, it is unnecessary to reset the tool after returning grinding wheel for measurement or dressing.