I have simulation the prankster attack in this simulation. Node 3 is programmed as a prankster propagating false information in the VANET cluster. The false information propagated by node 3 affect the movement of three other nodes. First, is 0, who accelerate its speed when spot a new node just coming behind it. Second, node 2 takes a right turn and collide with node 4 after spotting a suddenly appeared and very slowly moving node in its way which is very close to it. Third, node 1 which stops itself after spotting a node stopped in its way.