Steve Epting - Factor-X #04 pg 26

The prisoners are running riot, without any idea of where to go. Cyclops notes that this is not what he had in mind, and when the Infinite reinforcements arrive they'll all get picked off. Jean answers that they’ll have to lead them out themselves and she telepathically links his mind to some of the stronger survivors to shown them the escape route. But before they can get far Havok blasts Cyclops in the back, telling his brother that he has pushed him to far and that he is going to die. Jean attempts to telekinetically throw a metal ladder at him but Havok catches it, reminding her that she is still weakened from the battle with the Brain Trust.

This is from the X-men Age of Apocalypse Storyline.