Run out of sunscreen.
Paint a room. (Latex semi-gloss just flakes off)
Use the indoor (glass) (useless) target range.
Use the bathroom"
Nice username/post combo.
Spend a lot of money on window blinds.
Grow weed.
Play laser tag room-to-room, unless you use real lasers.
Use nails to hold up paintings.
Hide a safe behind a painting.
Fight the hypothetical.
Be a vampire.
Unless you live in Colorado.
Fill their house full of tropical plants, vegetables, and flowers, and be surprised when their house is used as an analogy to explain global warming.
Fill their house to the roof with ice water when a thirsty giant is jogging by.
Offer their house as the backboard for slam dunk contests.
Practice bowling.