Sirius shrugged, he was probably doing most of the work, but he was showing James how do to most of it as they worked. "Some of them I learned, believe it or not, I can read - though I'm sure some people would have you think differently." He chuckled. "But a lot of them I came up with myself, it's not like there are books that tell you how to make motorbikes fly after all."
He laughed and shoved at James shaking his head. "I got laid far more than most people do in their whole lives, I just happen to be brilliant as well." He grinned, there were probably some people who thought he should use his brilliance for things other than making bikes fly, but Sirius had always thought it was a perfect use of his talents.