Tomb raider underworld Wii, I'm stuck! Thor and the Serpent?

I've just added cogs to two side gear panels and puled a lever in front of a Thor statue to raise a serpent statue out of a pool in front of it which has a grappling ring on its head, and Thors hammer has risen up under his chin, and there a 2 of those 'wont die' guys in here with me.... what do i do next?