If I roll them evenly, this disproportionate edge pressure remains, and at a high speed the skis bend into two differently shaped arcs, rather than ideally parallel twins, meaning they are making two different turns of different radii and different speeds, and occasionally this results in a seemingly unexplainable fall.

FORBES: Why You Need Custom Ski Boots - Now

When the window hits the top of the door and stops, the high torque on the system damages the motor and can bend parts.

FORBES: Magazine Article

But the most fearsome of these fences isn't "The Chair, " a 5-foot-3 high hedge fronted by an open ditch, the sharp bend of the "Canal Turn, " or even the dreaded "Becher's Brook, " with its steep 6-foot-5 drop.

WSJ: Why They Fear Aintree's First