A minor spoiler sin in the scheme of things, especially considering the way it had been ruined in the trailer (the main trailer). That said, I'm glad it wasn't ruined for me. Like Stuart, I also didn't know, because I only ever saw the second teaser trailer which didn't spoil it (though the main trailer does).

Some people think anything in act 1 is fair game for spoilers, and clearly James Cameron thought that when assembling the T2 main trailer, but that isn't always the case. For example, when describing the opening act of my gothic mystery novel Spectre of Springwell Forest, there's a spooky incident in chapter five that I always gloss over, before leaping slightly ahead to the end of act one (at the end of chapter six). It is far better that this incident is left for the reader to discover.