VIDEO: The Rock has angry response to mean tweet on 'Jimmy Kimmel Live!'

Rule No. 1: Never tweet.

While appearing on "Jimmy Kimmel Live!" to read mean tweets with Bette Midler and Liam Neeson, Dwayne "The Rock" Johnson fired back at his mean tweeter in the best, most typical Rock way.

Ouch.

-With h/t to Huffington Post Sports