Ok so we know that avatars can vaguely remember remnants of their past lives. Like how avatar Kyoshi can perfectly recite one of avatar kuruk’s poems even though it was never published.
Ok now imagine this.
*Cabbage Corp setting up a cabbage stand*
Asami: Korra what’s wrong?
Korra: i... i don’t know. I suddenly feel... violent?
Tenzin, knowing fully well how his father reacted near cabages, has to physically restrain korra