Stephen Curry Snipping from the outside, way outside

We know Steph Curry is a shooter but what we don't know is that he has this pre-game routine that will make you scratch your head. What the heck is he doing outside the court?  With shooters like him, the NBA may already be finding ways to make it more difficult for them to hit shots, like may be widening the basketball court. Stephen Curry is one step ahead of everybody practicing a long shot from way beyond the sideline, the 4 point shot.