For some reason, that last scene reminded me of the scene last episode, Walt with Walt, Jr. poolside. When he fed him the tequila shots till Walt Jr. puked. And I don't know why. I guess because it was another stark example of how Walt's changing, becoming a product of his environment. Or maybe it was just the puke.

I hope Walt grabbed that syringe before he left. His fingerprints were on that thing!