The alarm listens to your body as well as to the world, so once you are stirred up the stirring becomes its own evidence. Replaying the scene keeps feeding it.

What the research says

In a laboratory study of 516 social drinkers, alcohol increased aggression mainly among those who dwelt on the provocation, which suggests the dwelling is the bridge between being wound up and lashing out. Rumination looks less like a symptom and more like the thing carrying the anger forward. It was a lab task with drinkers, so read it as a mechanism worth taking seriously rather than a measure of ordinary evenings.

Strength of evidence: one line of research. A single study, or a theoretical account.