Mr. Feeny performs a portion of Act I, Scene V of Hamlet (better known as the ghost scene). Athough Cory may not realize it, his responses of 'Oh God' and 'Murder?' are the same as Hamlet's.
Episode title is a line from Hamlet.
Cory refers to "Ernest Goes to Denmark," referencing the contemporary 90s movie series.
When Topanga throws Stuart's foot off of her, he falls backward and bounces a little when he lands, clearly having landed on a pad.