Freak out, buy lots of warm clothes, and start quoting the old Narnian prophecies!
WWYDI someone that glowed knocked on your front door and introduced themselves as a Narnian star?
"Um, hi.... Wait, NARNIA!!!"
WWYDI your pet(s) started talking to you?
Be thrilled because I've been trying for years to convince them that no, really, I'm a friend of Narnia, and I wouldn't show them at fairs or keep them from going back home if they wished...
WWYDI you found the Narnia wardrobe and went in, only to find that it let out in the White Witch's dungeon?
"Oh... How do I escape?"
WWYDI a centaur showed up at your house right as you were sitting down for supper?
O.o "What is going on?"
WWYDI a Naiad appeared in front of your house?
Try to get inside!
WWYDI a man dressed as a Calormene showed up in front you shouting, "The bolt of Tash falls from above!"?
"What in the world?"
WWYDI you saw a centaur from a distance?
Take it and wonder why Mama was giving me that stuff...
WWYDI you were attacked by Dwarves in the woods?
*gasp*
WWYDI you met a Talking Koala in Narnia?