Daredevil Geoff Gulevich has been riding mountain bikes since he was 12 years old.
Perhaps he needed all the experience he could get to tackle this terrifying, now-viral downhill run. As you can see in the video, the narrow terrain turns into an extreme rocky roller coaster.
We can tell you that Gulevich, now 27, doesn't crash in the first-person POV footage below -- and that still won't detract from the thrills. (We're still waiting for our white knuckles to revert to normal skin tone!)