Jumping from a plane may be the easiest way to achieve the ultimate adrenaline rush, other than giant-tortoise racing. The folks at Skydiving Nashville are there to help heft you out of the open door and usher you back down to the ground—in between, there's up to 60 seconds of free fall and speeds that can reach 120 mph. First-timers ascend to approximately 10,000 feet before jumping out of the plane, speedily descending toward the earth below while strapped into specially designed harnesses with their instructor. The chute is pulled at around 5,000 feet, at which point pairs glide down to their marked landing spot.