Give details as to why your hair stood up or the balloon stuck to the wall?
When hair stands up, it is often due to static electricity. This occurs when two objects with opposite charges come into close contact, causing the individual strands of hair to repel each other and stand on end. This can happen when rubbing a balloon on hair or when the air is dry and friction causes a build-up of electrical charge on the hair.
Similarly, a balloon can stick to a wall due to static electricity. When rubbed against a surface, the balloon becomes charged with electrons, giving it a negative charge. The wall, which is most likely neutrally charged, will attract the balloon due to the difference in charges. This causes the balloon to stick to the wall momentarily until the charges dissipate.