Good job!
Other examples I had in mind were:
Frodo threatening Gollum with the Ring before the Black Gate that he could make Gollum cast himself from a precipice or into fire.
Frodo threatening Gollum at Henneth Annun to make him choke on the fish bones.
Bilbo "threatening" him in the Hobbit - he didn't actually make a threat but Gollum became subdued at the sight of the drawn sword nevertheless.
I didn't have the one with Sam on Cirith Ungol, though.