Pin is pressing and holding a specific point on the muscle.
In 📝Resisted Soft-Tissue Release the pin is the contact under which the client works. 📝Pin and Stretch adds limb motion through that point; a pin by itself can stay still. It is a fulcrum, not a bruise, and not a trademarked protocol. Sharp, numb, or panicky under the pin is a stop.
Clients feel a precise pressure. Spreading the pin because it hurts is the right change.