Rule Number 1) When going down a steep hill, ride the brakes, especially on a curve.
Rule Number 2) When going down said hill, avoid any patches of loose gravel.
Rule Number 3) Stay away from metal signposts.
With that said - GUESS WHAT I JUST DID...
Let's just say... 30 mph descents + sharp curves + loose gravel on the curve + metal signs don't go very well together. Need I elaborate?