Tony spent the next couple of hours teaching Robert how to hypnotize people.
"There, with this tape we made, you can make anyone you want do whatever you want. Just put it on them while they're asleep." Tony said.
"Good." Robert said as he picked up the tape.
"Now change me back." Tony said.
"I can't yet. Weren't you listening? I have to wait twelve hours. That means you'll have to wait until five in the morning. You can spend the night here until then." Robert said.
"Okay, but you better change me back in the morning." Tony said.
A little while later, after Tony had fallen asleep, Robert came out of his room. He pulled the tape player out of his pocket and put the headphones on Tony.
"Time to see how well this tape works." Robert grinned.