George slingshots fake doggy doo-doo between Dr. Diaper's feet and he departs to change, while the boys destroy the robots and free Captain Underpants. Harold pulls the machine's self-destruct lever, thinking it's an "off" switch. Dr. Diaper returns and, enraged, aims his Diaper-Matic 2000 ray gun, but only that before Captain Underpants shoots underwear at Dr. Diaper's face. (It's later revealed shown that it was his own underwear - he comes out wearing a barrel soon after.) The four manage to escape the warehouse before it explodes and they then leave the doctor tied up and gagged outside the police station with a note that says "arrest me". The three return to the school, but they've lost the ring's manual. In desperation, George dumps a vase of water on Mr. Krupp's head and the principal resolves to give the video to the football team. George finds the manual, but throws it away, but it warns about one going back into the trance and back to normal. Meanwhile, the Knuckleheads love the video and decide to rename themselves the Purple Dragon Sing-a-Long Friends, even though the change doesn't go very well with the fans. George and Harold resume their comic book making and prank-playing. However, they have to keep an eye on Mr. Krupp, because for an unknown reason (obviously due to the warning on the back of the manual ordering ring users not to drench a hypnotized person over the head with water, or it will turn them back and forth from reality to trance if they hear fingers snapping), Mr. Krupp turns back into Captain Underpants every time someone snaps their fingers around him.