A light switch
The exact moment your friend goes from chill to chaos, like a light switch flipped in a bar fight.
“He went from chill to chaos like a light switch in a bar fight.”, @jacksfilms
“That’s not a light switch, that’s a light switch who’s fighting in a bar.”, @jacksfilms
“She went from chill to chaos, and it was like a light switch.”, @jacksfilms