When Zack crashes his bike, he winds up stuck at home with his arm in a sling, and his baseball season on the line. It's the worst thing ever until Zack realizes that the reason he crashed his bike is because his four-inch-tall alien houseguest, Amp, took its brakes. Now Zack's stuck at home, unable to do much of anything but hang out with his annoying little brother, Taylor. Of course, Taylor's ready to take full advantage in order to find out once and for all what exactly Zack has been hiding in his pocket.
