That is my bad for not being clear on my thoughts. I think the defender was late in getting there and his contact caused the offensive player to lose his balance and fall awkward. If I was standing on the baseline and the defender merely flopped and the offensive player was never touched and simply lost his balance then I have nothing. IMHO I think there was contact so I have to have a whistle.
As far as the “players on the floor philosophy” goes I’m only repeating what I heard and was told by a handful of DI men’s clinicians as well as an assigner. Bodies on the floor then you better have a whistle.
I have mad photoshop skills.