GRAMP: I'm sorry that I got upset about the Christmas tree.
I just really want to teach you that Christmas isn't about expensive trees, or fancy displays, or getting pricey gifts. SHELDON
GRAMP: I hope you fellas see that. SHELDON: We do, Gramp. We do. ARTHUR: On an unrelated matter, could Santa hypothetically squeeze a widescreen plasma tv down a chimney?
...How extensive are his super powers?