Mouse Hunt Easter Egg - Lion King Reference

Near the end of the film, where there is the party for the two Smuntz brothers are auctioning off the house, they are talking to the guests.

Ernie is greeting the guests and says "Hakuna Matata" to one of them, which is what Timon in The Lion King says.

This is to refer to the fact that Nathan Lane who plays Ernie in the movie was also the voice for Timon in The Lion King.