He had just been exposed as a liar and mentally unstable in front of his brother, his ex, his partner and the bar. I'm not shocked he couldn't keep the string of lies going. In his mind, Jimmy was the one he was exposing in his rant. Only at the end did he realize it wasn't appearing the way he thought it was. Like I said, it was foreshadowed at the start of the episode. Fairly clearly, actually.
|