Nobody cares what you're really doing! So make something kooky up!
Like, I'm on a laptop computer right now, but like, I don't own a laptop computer. I totally ran into a computer store and stole it off the table five minutes ago, and they totally called the cops and as I type this, three squad cars are chasing me! But they'll never catch me, because I have a vial of my patented invisibility juice <GULP> YEAH BAYBEE I'M INVISIBLE!