She doesn't -- she doesn't understand, Gabriel is dying and if nothing else she should be there, should be with Simon now, and River should too, and above all she should wake up from this horrible nightmare, she should wake up because this can't possibly be happening--

But River's tugging her arm.

And because it's River -- because it's her daughter -- she lets herself be pulled, and lets herself (makes herself) turn her head away.

"River--" Her voice shakes, and she clamps down hard on it. "River, what...?"

"Find the doorknob," River hisses, and pulls sharply enough that Regan takes a stumbling step after her, and then another.

They're halfway to the corridor behind the stage before she understands. When she does, she sucks in a sharp breath, and starts to run of her own accord.