This is a technique used by the DT that is being taught/coached in the NFL and it is trickling down to the collegiate level. The idea is to hold up the guard and prevent him from getting to the LB or to prevent him from picking up a looping DE and allowing the LB/DE to roam free to make the tackle. For the past couple seasons, the clinics that I have been going to have been stressing this and that we need to pick this up and when we see a high/low action, we need to first “process” what the DT is doing before we throw the flag for CHB. In this clip, we have to notice that the DT is holding up the G. Next, we have to see if the LB is roaming free which he is… then we have to “process” that there is no CHB but instead a DH. In this clip, this would be classified as a “classic DH” by the DT.