He told the story of his childhood and that his parents forbade him from having an air gun. He managed to raise the money and secretly mail order one (which was discovered by his mother after he left home for college). To understand this you must understand “A Christmas Story”.
He went on to share his experiences with the start-up of Instructables.com including the fact that all “twelve year old boys of all ages and genders” want to post DIY guns on the site. He showed some examples that were so extreme they were funny. Especially in the context of the pre-girl infatuation boys have with guns.