Dennis tells the truth

"You're not going crazy Lauren." Dennis said. "It's been me."

"You? What the hell are you talking about?" Lauren asked.

"I have this... power." Dennis said. "I can wish for something, and it'll happen."

Lauren looked at him for a long moment. Then she gave a sharp laugh.

"Ha!" She shook her head. "Right, you have magic super powers. Grow up Dennis, you've been reading too many comics!

Dennis frowned. Of course, even when he tried to tell the truth she was rude. Perhaps a demonstration was in order...