TR3 Jungle Shelf Corner Bug
Jump from the top of a corner, and a new way to embed in a corner. At a corner with a shelf next to it, place the outside edge of Lara's foot barely inside the line from the corner. Turn to 45 degrees. Jump forward. If she stays in the same place, turn a bit more and try again. When the angle is right (a little more than 45 degrees), Lara jumps from the TOP of the corner, by the shelf. In this case, I press Jump, Forward and Right together, so she curves onto the shelf.
Perhaps even more useful is a "failed" shelf bug: at any corner which is below a ceiling, set up the same, but hold Action while jumping forward. Lara will rise to the ceiling and drop to the ground, embedded in the corner. This allows you to embed in some corners where other methods don't work.
Reported by fallenangle; he doesn't recall the forum where he saw it, so anyone who can tell me, please do.