You just simply can’t say that this did not happen to you. Despite you already told the person a lengthy story, he might still come up with the “Apart sa?”. In the same context, you probably came across somebody in a supermarket who asks you: “Ki to p faire la?” or someone who phones you in the middle of the night to ask if you were sleeping or someone asking “tou korek la” while you are queueing up in the hospital.
Sometimes I’m so tempted to reply :
And what about somebody calling you on your fixed home phone line and tells you “Hey to lakaaz?”
… Non ta, mo p casse ene poz caudan!
Any more examples to quote???