My Stepmother Is an Alien (1988)

Ann Prentiss: The Voice of Bag

Quotes 

• [watching a video of two people having sex] 

  Celeste Martin : That is the weirdest thing I've ever seen.

  The Bag : That's why we gave it up 3,000 years ago.

• [as the Mills dog sniffs The Bag] 

  The Bag : Back off, Alpo Breath!

• The Bag : [as Dave, the dog, digs a hole in which to bury the bag]  You're digging your own grave, Fido!