Be excited! And pet it.
WWYDI you bonked your head on a branch while riding a galloping horse?
Thank you, Hobbit!
Pass out. And wake up with a dilly of a headache and complain about it and all my other aches and pains.
WWYDI you found the lionskin Jill kicked into the bush (in an AU world in which Narnia continued after the last battle)?
Probably freak out.
WWYDI you were arrested by Narnians?
O.O THIS IS SO COOL!!! ...wait, why am I getting arrested again?
WWYDI somebody called you a 'Second Rabadash'?
Thank you, Hobbit!
First be upset with them and then freak out at the Narnia reference.
WWYDI you landed in a world of Nothing?
Hope creation came soon after! Or want to go back home....
WWYDI you were drawn into a painting of a ship at sea but the crew on board didn't bring you up?
Thank you, Hobbit!
Eventually drown, I guess, if land isn't near.
WWYDI Reep jabbed you in the hand?
Be in pain (and scream).
WWYDI you saw the painting in VDT at a yard sale?
WHY ON EARTH WOULD YOU EVER GET RID OF THAT???! And then quit screaming about it before they decided to sell it for a higher price. 
WWYDI you were pulled into Narnia with the Pevensies in PC?
Thank you, Hobbit!
Book-verse: Try to survive.
Movie-verse: Try to slap some sense into His Majesty the High King. 😛
WWYDI you were told that Narnia was real but dead?
Party! And then pout for a few years....
WWYDI you saw a unicorn running straight towards you with his horn pointed at you?
Thank you, Hobbit!
Likely end up freezing in my tracks....
WWYDI you saw Jill, Eustace, and Puddleglum nonchalantly escaping Harfang?
Dum de dum de dum de dum.... What? What are you talking about? I don't see a marsh-wiggle and two human children...
WWYDI Reepicheep beat you at chess?
Thank you, Hobbit!
Try again? I'm terrible at chess anyway. 🙂
WWYDI a dragon stood between you and your car?
*doesn't need to go anywhere that bad to cross a dragon to get to the car* Run back inside.
WWYDI you were dragged into the snow-dance?
Thank you, Hobbit!
