The family name "Sackville-Bagg" in this film is a reference to J.R.R. Tolkien's "The Hobbit", as Bilbo and Frodo Baggins are related to the "Sackville Bagginses".
When Tony has a bloody nose his mom has put tissues in it to stop the bleeding. She pulls out one side and says still bleeding so she gets more tissue, while she is rolling it up there is no tissue in that one side of his nose. Then after she is done rolling it up the tissue is back in his nose without her putting it there, then she pulls it out again and replaces it with fresh tissue.
When Tony throws a stone at Rookery's light to save the Sackville-Baggs, he pumps his arm and says "Goal!", though his mouth clearly says "Yes!" Also, Rudolph, in response to this, says "Wow!", although HIS mouth clearly forms the words "Oh, man!"
When Tony is lying on his bed, talking to Rudolph who is resting in his box, the boom microphone's shadow can be seen on one of the light spots on Rudolph's box.