Interrupted stone wall - North slope of Wachusett

Posting videos is almost not worth it. They are grainy to start with and get more visually degraded when I upload to Blogger. Also, most times there is no sound when done. In case the sound does not get through: I am calling attention to a section of wall that stops being a single course of rocks and becomes an oblong, that is sectioned off into small depressed sub-sections, reminiscent of some rock piles I have been commenting on this year. Here is a still:I was a quarter mile in on the "Bolton Trail". This was uphill at the same place that the wall was down hill: