A really good way to impress your friends is to re-enact the scene in The Wizard of Oz where the Wicked Witch of the West dies.
Simply dig a very deep hole. Whilst wearing a long, flowing robe, stand over your hole. Either wait for it to rain, or for someone to pour water over you. Slowly lower yourself into the hole and scream "I'm melting!" while making sure that the robe covers the hole. Stay in the hole until the applause dies down. If it's raining very heavily, don't stay there for too long or you might catch a cold.