No.

Let's be honest, the chances of anyone staying on their feet in this case is slim to none. Debating whether or not this shooter would have stayed on their feet and a flagrant call is proper is pointless in this case. Show me a video of a shooter being pushed from behind while airborne and landing on their feet and let the debate begin.

I do not think hitting the wall is a factor here. Without the wall I would still call a flagrant.

I totally disagree. I see a lot of players get pushed like this and stay on their feet. Again, the configuration of the court does matter and would be a factor. Not all players are under that much control. But to say that would not happen, is not very realistic if you have seen what these athletes do.

Peace

Just to clarify, when I said shooter in the later part of my post I meant attacking the basket, as shown in the original video. If you see that a lot then I would be very suprised. These types of plays don't come around often.