I see a lot of people wondering why Harley did not pick a lock, break a window, or break in the house some other way, rather than accessing it by chimney. I think there are 2 reasons: First of all, if he broke out a window or damaged the home somehow, he'd be in big trouble and held liable. He was already skating on thin ice with his mom and possibly the police. I truly believe he thought if he went in through the chimney, when he was ready to leave, he could go out a door, and lock it behind him, and voila! No one would ever know he'd been in the home. Second, I think this was an adventure, and as others upthread commented, an urban explore. The climbing the antenna tower, the thrill of doing this and not being caught (it was still dark, not much chance of somebody seeing him), "going down the chimney" like Santa, exploring an unoccupied house,--all of that appealed to his 14 yo self. MOO.