LOL! This thought just occurred to me!
In the levels England and Peru, if you think about it, if it weren't for those guys coming down after Lara she would have been stuck down there! LOL!
I mean, everything falls to bits in England at that staircase...and water is all sucked out in Peru so she can't just swim back up!
But then again, as Lara says..."There's always a way."
Sorry, kinda random