What is he up to now?

Max first asked me to help him zip up Daddy's biking shirt, which he had gotten himself into, and then he disappeared into the garage. Hmmmm. He isn't doing what I think he is doing, is he? Yes, as expected, when I looked out in the garage, I saw him sitting on top of Josh's mountain bike, balanced precariously. I probably should have taken him right down, but he was too cute so I took some pictures first.