Only 15mi from The Strip, the LV Motor Speedway hosts events the NASCAR Sprint Cup Series and NASCAR Nationwide Series, as well as racing classes and demos like Exotics, Dream, and the American Muscle Car Challenge.
These guys are actually crazy enough to allow you (who must also be crazy) to zip line from tower to tower at the Rio Hotel at around 33mph... and 400ft in the air.
If your ego needs a bit of a boost, look no further. Battlefield is one of the most badass interactive attractions in Vegas (blows tequila shots and a soaked bathing suit out of the water), with over 25 real military vehicles and even more (real!) weapons. Grab one of 250 fully automatic machine guns and head out to the 200+ acres of desert battle grounds. Let er' rip!
Try your hand at saving the world with the "Zombie Package" that has you shooting an AR15, an XDM9, and a shotgun. Or, choose a VIP package like the Triple 7, which'll leave you having fired over 500 rounds with 20+ weapons.