^ I've seen people BORN and RAISED in PAKISTAN who can't pronounce certain letters like sheen. And some can say ray perfectly but they can't pronounce aray as in the word "larki". Sometimes it can also be a slight individual speech problem. That does not necessarily mean that the person is bad at speaking urdu. The urdu language is so vast that it is not confined to just one letter's pronunciation.
hehe.. yeah urdu is very important for sky diving.. agree with you there