 Cats make wonderful companions, but they can be curious critters. They like to bump their heads against us, sleep in tight boxes, need our laps, and engage in all sorts of weird behaviors. What do these behaviors mean and when should you seek help from your veterinarian? Cats and especially kittens can be very playful and energetic. Sometimes they expel all that energy by darting from room to room, jumping up and down on the furniture, and going a little crazy. This kind of behavior can also be a reaction to catnip, which can make cats act goofy for short periods of time.