Monica's coffee addiction! She orders the strangest stuff sometimes.
There's also this gem from Tess in "Sins of the Father": "You stole my car! You stole it and then you killed it! Will you look at this? The Angel of Death done killed my car!"
Actually, Tess is pretty hilarious when anybody messes with her car. In Season 4's "Sandcastles," she experiences car trouble and Andrew tries to fix it. She ends up giving him a classic Tess tongue-lashing, complaining about "getting her hands all greasy" and lecturing Andrew on his talents, or lack thereof.
In "Inherit the Wind," Deadpan Snarker George the butler greets Kevin Greeley with, "Master Kevin, last night, someone carved the words, 'This party is da bomb' on the baby grand piano." His British accent and calm delivery totally sell it.