That surprises me.
A phrase taken from "Dinner for Smucks". It should be spoken somewhat sarcasticly after an odd, absurd question has been asked of someone you don't know well.
Example:
Hipster: Have you lived among Alaskans as one of them and dined upon bear meat?
Hippet: No!
Hipster: That surprises me...
Hipster: Have you lived among Alaskans as one of them and dined upon bear meat?
Hippet: No!
Hipster: That surprises me...