(Trying to be slightly insulting and exaggerating) "There are hairs in this pool that are like... a foot long!" (meanwhile, I am laughing inwardly, saying to myself, "You have no idea. Some of those hairs are three feet long.")
"Are you from Little House on the Prairie?" (This was not said insultingly, merely smilingly. I hope they weren't actually wondering that.)
"Look at those walking Jews!" (um, okay, hi to you, too!)
"Are you Amish or something?" (I guess they've never seen Amish people before... we wear buttons, prints on our clothes, and so on, and we don't wear black aprons or caps.)
"How do you run in a dress?" (um, kind of like you run normally... you know, one foot, then the next foot, and repeat quickly)
Once, I was walking around our small block with my brother Matthew, and someone drove by and stuck their tongue out at us! I just waved and then laughed over it later. It was so random!
I'm sure there are more things, but that's all I have at present. I'll try to add more later.