OK - you're here because you don't fully under the concept. "What's telemark skiing?" you ask.

Telemark skiing, also called "free heel" skiing, is actually the oldest form of skiing. Prior to the invention of lock-down bindings, all skiers "telemarked". Originating in Telemark, Norway, a telemark skiier is attached to the ski only at the toe binding. That is, the skier's heel is free to lift up. Turns are made by extending the downhill ski forward while dropping back on the uphill (or inside) ski - the opposite of what you do to make an alpine turn! You perform a telemark turn as a series of knee-bends on the inside ski during which your heel raises off the ski. Enough words, here's what it looks like by a stylish tele-racer: