Iranian police helps hitchhiking

Today the police helped us hitchhiking. Very friendly Iranians again. They didn’t understand what hitchhiking is, so we told them we have no money. They were super surprised about this, but after some minutes one policeman got out of the car. He took his stop-sign and stopped two cars at the highway for us. The first car took us further, the second car was waiting a bit worried behind the police car because he had no idea why he had to stop.