Avalanche had no problem with chaos. Three years in the Brotherhood did that to a person. It was easy to ignore most of the surrounding battles while focusing on what he did best - complete and utter destruction. The ground rippled from around his feet at intermediate moments, generally causing havoc some distance away. It was a lot like bowling - from the opposite direction. They fell down the same.
He kept his tremors close to the surface, trying to avoid ripping through pipelines and other cables buried beneath the ground. Still, it made enough damage all on it's own. One of the combatants charged at him. His unfortunate opponent did not have the ability of flight, and thus it came as quite a shock to the unfortunate man when the ground seemed to drop beneath him, leaving him to plummet into a pit some 20 feet below. Another ripple had the ground effectively swallowing him up - leaving him trapped there for however long it happened to be. Sucked to be him.