
Hey, since he stepped up onto your arm, you can probably keep getting him to step onto your arm, but try and get him closer to your hand. For example: If he's stepping up onto the area near your elbow, try and work on getting him to step up closer to your wrist. Once he can step up onto your wrist, then it won't be as hard to get him to step up onto your hand.
That would be better than my previous idea of trying to corner him and force him onto your hand.
