No, I think you're just shivering because it's too cold. It might also explain why you're seeing things. [ You can also tell Garen's not drooling because he doesn't have a line of ice growing down from his mouth. It's very cold. ]

I'm not giving your jacket back yet, if that's what you're asking. [ It's keeping him far warmer than any amount of clothing should. ] Let's just get back inside as quickly as possible. [ He's still holding her hand, not commenting on it, just... more than happy to "forget" to let go. ]