Freerunning

Freerunning is a term that represents the polar opposite of Camping.

Originally nameless for many years, several players eventually coined the term specifically for roaming players in Quarantine.

Overview
Freerunning is exactly what the name implies; you roam the map without ever stopping to rest, no camping, no pausing, no time to think. It is a technique preferred by many "pro" players who rely on full Speed Gear.

In doing so, you can be almost untouchable. Other players will always have difficulty "tagging" you because you`re never in the same spot for more than a few moments. Freerunning requires very quick reactions and fluid movement, while a steady knowledge of the map must be known. You must be able to easily outmanuever your enemies; which overcomes the disadvantages of both the Infected's speed and constant enemy fire.

On the other hand, the technique is disliked by many since it can be overpowering and the person freerunning in question often decimates his enemies with ease. Not surprisingly, players who free-run often rage when they are caught; blaming it on lag, hacks, and eventually Rage Kicking the person who caught them.

Trivia

 * This can be extremely effective in Quarantine, and much more fun what waiting for the zombies to come to you.
 * In One Man Army sniper-only matches, especially on Junk Flea, this technique can be devastating.