So because I never really read usernames while reading comments, my mental parser read this as River [Tam's] Law, which was apparently not immediately rejected as incorrect because she is a bit different in the mental department and would probably react... appropriately to the word "retarded".

As much as I appreciate river_styx's contribution to the development of River's Law, I really think my mental flight of fancy is superior. Or at the very least would make for a better motivational poster:

"Don't Say 'Retarded', Or She'll Kill You With Her Brain"