No, a Boston Crab is where someone sits on your back, grabs your legs and puts pressure on your back. What I am talking about is when someone has you on your back with ur arms pinned down by their knees.
High mounted pin or the salavery position the only thing I like to do is make space slip out the back grab leg then do leg lock.
Boston Crab?
I don't know what is called exactly but it's a wrestling move where someone has your arms pinned down with their knees and sits on your chest? Also is there any way of getting out of this? I do think it's probably best to avoid this situation altogether as being the best defence. I know there is a lot of tutorials on how to escape full mount and things but do not see anything about this.