Drake's Fortune Glitch?

[Groo The Perverted]

I'm on the Fortress area (about to go to the Waterway). I climbed up those steps and saw Ellie's parachute and you walk up and you're supposed to hit triangle (when it shows up on screen) and it'll cut to the scene of you sliding down that cable.

But it's not showing the triangle. I've gone through this three times now and I've died a few times trying to jump and grab the cable (even though I know I don't do that) because it won't show the triangle to trigger the cut scene.

Is this a glitch or is there something I'm not doing?

Plus when you look up at the parachute, it used to have Drake say "that could be either very good or very bad" now he's not even saying that.