Everyone knows that supercars are loud. But audio, especially in videos, does a poor job of revealing just how loud supercars really are. The unsuspecting woman on the side of the road was having a conversation with her friends, when a Koenigsegg CCX roars past her. The CCX's 4.7-liter twin-supercharged V8 produces 806 hp and a brutal sound that's similar to rolling thunder, only better. Just as the supercar begins to enter the tunnel, the driver pins the throttle and lets all of its 806 horses loose.

The lady flips out and nearly loses her mind as the supercar roars past her. Supercars have another talent: being able to scare the bejesus out of people.