Hi Scott, hope your finger is healing. Basically it is called an extended forward/reverse roll. It is used a lot for back up and especially useful when you go up the neck with g/c/d combos. The strings are 3,2,1,5,1,2,3 (which is the normal forward reverse) and then 1,5,1,2,3,2,1,2. As far as the right hand fingering it is TIMTMITI and then MTMITIMI. But you don’t break it like I did, just keep the whole thing flowing and it sounds just like it is called, extended forward/reverse roll. Good luck.