Power
You can use your knowledge of math, mechanics, and physics to create amazing coasters that people will travel all over the world—and wait hours in line in the hot sun—to ride. Which is awesome, unless they get heat stroke.
You probably could also build elaborate Christmas light displays with moving parts.
You'll also likely become an undisputed champion of Roller Coaster Tycoon. In fact, if you have trouble finding work on real roller coasters, maybe you can design the next version of the game.
Once you're all done, you can be the first one to ride the roller coaster you create and can in fact, cut in line. Now that is true power.