The instant Damien finished consuming the storm, Chaos charged. The lightning that blocked his way was removed, so it had to take this opportunity to eliminate the threat to its life.
Chaos, in reality, didn't have a personality. It had an arrogance formed by its life as a supreme concept, but any sort of emotion or personality he showed was just an act.
As a Spiritual God, the only "emotions" he could show were those that related to the concept. Even then, rather than being true emotions, those were just another manifestation of Chaos.
The ego of the Spiritual God had little to no control over its actions. It was merely born as a byproduct of the creation of a physical form.
However, there was one time that any being could show true emotion regardless of whether they were allowed or not.