Willack/Ballson Effect

Balance that occurs when an act occurs or is executed (whether intentional or not) and then the same thing/person (living or dead) does the opposite of the original act/action. Which causes an average between the two acts - balance.

Guy: Last week I didn't exercise at all, this week I've exercised till I couldn't walk.
Girl: That's the Willack/Ballson Effect, nice.