"How dreadful!" cried Lord Henry. "I can stand brute force, but brute reason is quite unbearable. There is something unfair about its use. It is hitting below the intellect." ~ Oscar Wilde - The picture of Dorian Gray
INTP, probably. And they are funny, too. They are so carried away by the clever stuff going on in their own minds that they don't see what's right in front of them until they've crashed into it. They're the only type that I can think of that's oblivious to a big brick wall!
I'd say ENFP. Crazy shit going on in their heads. It's like there's an amusement park in their heads and they're jumping from ride to ride every 2 seconds while having a conversation with a random person on their ride.