My friend also told me that his dad, when he was 8 or 9, once walked up to one of the Ghurkas and asked him if he could see his knife and the Ghurka obliged and pulled the knife out for him to see. Then, before putting the knife back into its scabbard, the Ghurka sliced his finger and drew blood. The reason for this, as I am sure other people on this thread will tell you, is that when a Ghurka unsheathes his knife he can't scabbard it unless it has drawn blood. So if a Ghurka pulls his knife and doesn't use it against somebody, he has to use it to draw blood from himself before putting the knife away.
I find myself liking these guys a lot!