"We don't get got, we go get!"
Oh, Sunny. When you funny, you funny. And "Mac and Dennis Buy a Timeshare" had plenty of potent laughs due in no small part to the returning Ben the Solider, the returning Maniac (played by the iconic "Rowdy" Roddy Piper), and Frank stuck, for the entire episode, in a child's playground apparatus coil in nothing but his underwear.
"How did this happen?" asked Charlie. "How does anything happen?" snapped Frank. Holy hell, I was dying. Especially since the entire episode went by and we never found out just what Frank was trying to do in the first place - after he took off with no explanation and headed to the playground. Something about a dream he had. Yes, the not knowing any of the details makes it exponentially funnier.