how do you differentiate between a pakistani and an indian?

[TLK]

@COLD_FIRE

Please look for sideways movement at the neck.
If his neck moves more then his tongue, then an Indian no doubt.

I think its more common in South Indians and South Indians can be recognized by their features. Problem does happen between North Indians and Pakistanis from the East side of Pakistan. Balochis and Pathans have distinct features, but for Punjabis. Sindhis and Mahajirs, it could get a little hard to differentiate them from a Delhi or Eastern Punajb person.