Well i do it like this:
Me: "Hey, whant to see a magick trick?"
Her: "Sure"
Me"[Burst into laughter & and get the wtf look] Sry, its just that your ears wiggled just now, are u Croatian?(im Serbian so a near contry to me is Croatia), cause i have a friend with the same issue

"
Her:"No, I'm Bosnian"
Me:" Lol, hell no u'r 2 funky 2 b Bosnian, are u lying to me?Are u like this to all your friends?"
Her:"Lol, I'm not lying"
Me:"omg I'm kiding, damit girl, stop bing so wierd and losen up, i can imagine u playing a game of chess with that atitude, u like chess dont u?

"
Now, do u see wheres "the wana see a magic trick" ? The point is to have a 1-2 default thing's 2 say ( ears wiggle, and 2 funky 2 b Bosnian ) and the rest is observation with teasing and humor.The hard part is not to look 2 hyper active, u know always interupting etc. just patiently shut up and w8 4 the right moment 2 interupt, but u'l get that in time