GRAMP: Sheldon, did you invent some sort of TIME MACHINE? SHELDON: No! Yes! Maybe! ...Why do you ask?
GRAMP: Because I just bumped into a barefoot George Washington in the den. George Washington: I can not tell a lie... I love how plush your carpet is... SHELDON
GRAMP: And I notice Christopher Columbus has crashed in our living room... Christopher Columbus: I claim this couch for Spain!
GRAMP: And Henry the Eighth keeps running from room to room... Henry VIII: Quick!! Where can I find the throne?
GRAMP: And then there's the small matter of the triceratops in the kitchen! SHELDON
ARTHUR: Uh-oh... and he found the milk again. triceratops: ERMF? SHELDON: NO! You've already had enough "Cap'n Crunch"! Ten bowls in one day is your limit! GRAMP: For the last time, young man - we do not break the laws of physics in this house!