To be fair, it looked incidental to me - just tangled feet. Sucks when it happens,b ut it goes both ways. Ahh, gotcha.
The "control" thing is way too subjective and should be put in the bin. If you come up with the ball without it having bounced off the ground, call it a catch.
There was a clear push to the lower back of Hopkins. You can see how off balance Hopkins got after it.
Yeah I just don't see how the "control through the ground" rule comes into play when he fumbled while running. NFL needs to clarify