Geno Atkins is a very strong human. So strong he makes other very large humans look like they are pumped up with air, like poor Dolphins offensive lineman Jermon Bushrod.
There are a lot of techniques to play offensive line. Getting obliterated so badly that you literally fall over and take out your own quarterback is not one of the better ones. A sack without touching the quarterback!
The only question is whether Atkins gets credit for the whole sack on that play or if Bushrod also gets credit for the tackle.