"I, I, I..." he began, then forced himself to stop. He took a breath and released it slowly, and then tried again. "I nuh-nuh-nuh-know. Ih-it's b-b-b-b-buh-be-be-because I'm h-h-h-h-hu-here. Th-the ssssame th-th-thing h-h-huh-happened in the, the b-b-b-buh-, the b-b-book ah-and the muh-muh-mmmmovies."
He would talk to his family, of course, but he'd probably end up writing everything down if his stutter didn't calm down soon.
"Duh-did y-y-you see muh-my h-h-h-h-house?" he asked after a few moments to try and get his frustration to die down. "Th-the o-o-one w-w-wuh-with ah-all the b-b-b-b-buh-bikes in the f-f-front yard." His smile was clearly forced, but it was still a smile.