One thing about the Alabama defense that really pops out at you is the size of their athletes and their closing speed.
They have multiple 6'4" 240-260 lbs linebackers and ends that run like deer. LB intercepts a shovel pass and blows out his leg.
Next guy fills in and they don't miss a beat.
Corners that can actually tackle and aren't afraid to lay the wood on someone. Very nice to see after watching so much terrible Pac 12 defense this year.