When Sheldon begins to Skype with Amy, there is a Gollum figurine on his desk. After the break-up and disconnect, Sheldon turns to speak to the figurine, which now has rotated 90 degrees. Gollum was never touched.
Stuart closes the comic book shop early because Bernadette is making meatloaf. However, when it cuts to the kitchen scene, Bernadette is making spaghetti, not meatloaf.
Sheldon refers to butterflies as "flying worms". As a genius, Sheldon should know that worms do not turn into butterflies. Caterpillars turn into butterflies.
Although goats are highly curious and will nibble on anything to determine its nature, they do not actually eat tin cans.