:P

1.Impersonate a film character for the day, for example Forest Gump.

2.Every time that あなた wake up, start screaming “Where am I?” and run around your room for a few minutes, then return to bed.

3.Every time あなた take a shower, scream “I’m Melting! I’m Melting!”.

4.Smile… all the time.

5.When someone knocks on the door, get up and answer the phone and vice versa.

6.Scatter stuffed toys around the room with party hats on and play loud music. When the roommate walks in, turn off the music, take off the party hats and starting putting the toys away saying it was fun while it lasted.

7.Call...

Instead of ミルク and cookies, leave him a salad, and a note explaining that あなた think he could stand to lose a few pounds.
While he's in the house, go find his sleigh and write him a speeding ticket.
Leave him a note, explaining that you've gone away for the holidays. Ask if he would mind watering your plants.
While he's in the house, replace all his reindeer with exact replicas. Then wait and see what happens when he tries to get them to fly.
Keep an angry ブル in your living room. If あなた think a ブル goes crazy when he sees a little red cape, wait until he sees that big, red Santa suit!
Build...