Nothing to do with catching empties from an ejector gun But;
I once saw Bill Jordan on the old TV show "You Asked For It".
He stood upright, placed his right elbow against his rib cage with his forearm stretched forward horizontal, palm down. He placed a ping pong ball between two of his fingers. He was wearing a S&W .38 revolver in a regulation police rig for the time, Sam Browne as I recall. Anyway it carried the gun at waist level, not down low on the thigh. ..
He stated he would drop his hand from under the PP ball without flipping it up, draw & fire all 6 rounds before the ball hit the floor. He whipped that .38 out of the leather like lightning, BUT, then thumb cocked the hammer, took aim & fired. Followed with the other 5 in like manner. I'm sitting there thinking just who is he fooling, that ball has long since hit the floor. After firing round #6, he pivoted his right hip forward, reached across with his left hand, picked the ball out of the holster & dropped it to the Floor.
That took a lot of practice. As he was drawing the revolver he had to pivot his hip forward enough for the ball to hit in the holster. It all happened so fast you just couldn't see it, at least not on TV.