Hull had committed unnecessary numbers forward and were holding a worryingly high a line at the back when Mendy inexplicably missed a Ryan Shawcross punt upfield, allowing Ethrington to race in from the left and lash a powerful near-post finish past Matt Duke.
Matt Banahan's powerful finish put Bath back in front and although three Geraghty penalties gave Northampton the lead, Barkley's penalty saw Bath home.
We learned that the first units out of the door will look a little different to these samples, the white version gaining a glossy finish, while the black edition coming with a matt rubber coating.