Oh?

Oh?, is a saying most people would use if they come across something odd. Their friend may say something out of the ordinary, by saying "oh?" Means you weren't expecting that.

Friend 1: *out of nowhere* elephants are giant grapes
Friend 2: oh? That's.. Odd.

*searches the internet*
Person 1: ...hmm...
*sees a weird \ funny image*
Person 1: ..hm- Oh?