The thing that confuses me is that you can have two feet on the ground while catching a ball and also be going to the ground. Jumping and catching the ball in the air is not the only way to fall to the ground. A runner could stumble, catch a ball while going to the ground, and then take a couple of steps (while going to the ground) and they would call it a catch. It is clear that blandino thinks these two scenarios are different, but do the rules specify that there is a different threshold for someone going to the ground after jumping in the air vs someone losing balance while running (or due to contact with a defender) and going to the ground? I would argue that Thomas was already in the process of falling down when he caught the ball. He lost his balance, but managed to secure control and take a couple of steps (while going to the ground).