Three shots:

• Walk cycle animated to indicate an emotion, mood, or performance (happy, sad, sneak, gallop, run, etcetera).  See chapter 5 in Character Animation Fundamentals as well as The Animator’s Survival Kit for more information and examples.  Work to convey your chosen mood here; avoid just keyframing and calling it something after the fact.
• What’s in the Box?  Your character opens a box of some kind, in which the audience cannot see.  The character reacts and must sell the audience on the reaction to what’s inside.  Choose from happy, sad, angry, surprise, contempt, fear, or disgust or a more complex progression of emotions.
• Performance Piece with Lip-Sync:  Choose a favorite line from a film or game or record your own dialogue.  Have your character act a performance that somehow connects to the dialogue — be creative!  Convey as much emotion through primary animation moving down to secondary, then key-frame lip-sync performance to the dialogue for the final touches along with facial animation to convey the full emotion of the acting.

You may use the Goon in any version, Groggy, or if you choose, another rig — just make sure to test its range of motion and performance and that you can use it before attempting to animate with it. Post these to your portfolio site.  Be prepared to present on the due date.