Which Vala tripped Gollum?

[Inziladun]

Originally Posted by PrinceOfTheHalflings

The Ring has, in some way, it's own will. Just as Frodo and Sam sometimes feel like they might just lay down and die rather than complete the Quest, perhaps the Ring too sometimes craves oblivion nearly as much as it craves reunion with its Master.

I still doubt that the Ring intended its own destruction. Think of how much pressure it was exerting on Frodo at Mt. Doom to prevent him from throwing it into the Fire. And it succeeded. I think the "will" of the Ring was to stall Frodo until Sauron could come in person and deal with the pretender. It was Gollum who was the wild card, playing the unforeseen part Gandalf had intuited.