One thing we liked to do in Iran was either call people using 2 phones or just drive around and pretend we are Arabs. We would speak in broken Arabic based on what we knew from high school and the rest we would use regular Persian words and just add "al" to the beginning of them. If we did the phone thing we would pretend that it was a crossed line and that they were listening in on our private conversation. Once the guy said something to us, one of would yell "قف قف الخط روی خط". Then we would start babbling to the guy who I'm sure would realize it was all fake but would stay on the line as he found it amusing.

With the car thing we would find a kid by himself and as we approached him yell out the window "قف قف" Then we would go up to him and ask for directions like "الخیابان الولنجک الکجاست؟" Some kids would get really nervous and try to give us directions, others would see through it and mess with us. One time after we had got some noon barbari we approached a group of kids and went through the routine. My friend then said something like "ما از عربستان اومدیم" to which one of the kids replied "آره از نون بربریاتون معلومه" One variation of the car routine would be that we would pretend we were from Isfahan and looking for directions and try talking in an Isfahani accent.