MENTAL BALOON PREDICTION MAGIC

Magicians shows three different colours ballons on a stand in three chambers. Below each chamber there is a covered door. Total 3 covered doors name as 1,2,3. He opens the doors one by one to show all are empty. Then secretly write an arrow by chalk on any chamber as his prediction & covers three doors. Then tell public to blast any two ballons by a pin. After blasting 2 baloons last one is remain. Then he opens the below chamber of the ballon. Magically a predicted arrow which indicated the top baloon is arrived.