What kind of contingency circumstances do you you people use/allow? The spell description seems pretty vague. Can you use it to activate a teleport as a fireball detonates or a disintegrate ray is about to hit you? Do you have to know something is about to happen? For instance, could you state something like "when I am targeted by a death effect I will teleport to the dungeon entrance", even if you didn't know you were being targeted with the spell?