(Sorry about the title, trying to avoid spoilers.)
So near the end of the Arkham City video game...
Hugo Strange initiates a bomb countdown in Wonder Tower, Batman jumps out with Ra's al Ghul. As they are falling, Ra's takes his sword and stabs himself through, presumably attempting to kill Batman as well. Of course he fails and ends up just killing himself.
My question is, what reason(s) did he have for doing that? If I remember correctly, he mentions plans for taking over Gotham, etc.
Talia is still alive, and (although he might not have known this) being held hostage by the Joker at the time.
So why would he do that?