Gronks momentum was taking him far from the ball. What's being lost in this is that even if Kuechly wasn't hugging Gronk, he still had position on him and Gronk wouldn't have been able to go through him AND Lester to get the ball.
Like I said in the gameday thread, this is going to be the game that gets Greg Hardy a monster (lulz) contract this offseason. Our D is what they will be talking about for the next couple hours until kickoff, and he will be showcased as an important part of that D. He is going to destroy Brady like he did Palmer, and the rest of the NFL world is about to find out who The Kraken is.
Enjoy him while he is here boys, after three sacks tonight, he gone this offseason.