Quick! Find The Medication!

After yesterday, when Uncle Denny (The Original and Best Grouchy Old Cripple) said some things annoyed him I thought he'd gotten that out of his system.
 
Not.  Fucking.  Likely.
 
It looks like he's gone off his medication entirely and has progressed from things that merely annoyed to outright Bitch Slappings, and it is A Thing of Beauty.