All packet-delivered attacks are effective on contact with the target or any of the target’s immediate possessions, such as a shield or cloak. Packet attacks include spells, gas globes, and certain monster abilities. Note that packets still don’t count if they hit the throat, neck, or head.
You may not throw a packet with any other in-game or out-of-game item in your throwing hand, including other packets. You may touch-cast on yourself or another with another item in your hand, but this must be done safely and courteously