See my previous post. The Warrior of Light has an Echo vision. Ryne only clutches her head, and the next time the scene moves back to Amh Araeng, she's suddenly a fair distance away and needs to be woken up.
EDIT: Yes, it's kind of annoying, lol.
But seriously, I can't believe she possesses the Echo—there is too much evidence that she doesn't, and the only things that have ever suggested she does are one misleading scene and one misleading bit of trivia—that Ryne is "Minfilia's reincarnation". The reason I say it's misleading is because Minfilia calls out her own existence as being akin to an Ascian's during the Echo vision in Il Mheg. Ascians don't reincarnate. They possess people, and those people don't need to have a fragment of the Ascian's soul for them to do it.