I'm Sorry Your What Eyes?

I just spent a weekend at a wedding and my friend brought his girlfriend that very few of us had spent much time around. His girlfriend is a wee little Asian lady that we shall call Margaret (fitting I know). We were all in a group making our normal wise cracks and being the silly people we are while Margaret was acting shy and only giggling every once in a while. All of a sudden out of left field Margaret chimes in "You better look out if you see me and my squinty eyes driving down the road, I might kill you." We were all a bit flabbergasted and didn't know if we should laugh or if she was being serious.