Mike Robertson Exercise Question

After reading “Heal that Hunchback”, I have a question about two of the exercises he had at the end, because he only named them and I don’t think he explained them in the article.

Muscle Snatch
Low Pulley ER

What are those?

Thanks!

Google is a wonderful thing.

jva.ontariostrongman.ca/MSN.htm
Low Pulley ER = Low Pulley External Rotation (he made this up)

Stu