Team USA skier Lindsey Vonn describes snow injection, a process that involves using a hose with special nozzles to squirt water beneath the surface of a skiing run.
Injection is essentially a slope where they have iced everything down, usually as slick as an ice skating rink. It's really really difficult to ski on and it doesn't allow any tracks to be made so usually the course is the same for number one as it is for number seventy. They have an injection bar. It's like this long bar with little nozzles, and it shoots water down; they let it all spray in and then they'll pick it up and move it down like a couple inches. It usually freezes pretty far down, but it's a pretty painful process for the coaches who do it because they've got to be out there, I think, it's usually from like 8 p.m. till like three in the morning.
