hi rhumbagirl, the truth is this is a finisher vid for a series i made about hihat independence based on all the options of a group of four sooooo, in this case I was improvising but that specific moment you pinpointed I'd say I was playing bass drum patterns in my vocabulary and filling in between with the hihat. Here's a link to a video about that idea except it's done from the reverse perspective, the hihat is playing and the kick fills in. Either way it's a set of exercises aimed at getting this to happen for you in a musical way thanks for asking the good questions
thanks!Absolutely fabulous.