Needed to swap out the drivers side O2 sensor tonite. Got all the engine covers off, and couldn't get the freaking slit side deep O2 sensor socket all the way down onto the O2 sensor. ARGH!!!

So all I got out of it was a set of skinned knuckles. Need to return this POS O2 sensor socket and get a crows foot O2 sensor socket.

dammit.