What you’ll need: A space suit, name tag, white blazer, striped dress shirt, dark slacks and dress shoes.
Instructions: Put on the space suit and affix the name tag to the front with “SpaceX” written on it. When trick-or-treaters arrive, explain your role as SpaceX CEO. Halfway through Halloween night, change out of the space suit and into the blazer, dress shirt, slacks and shoes and tell everyone who comes to the door that you’re reprising Musk's cameo in Iron Man 2.
To go the extra mile: Greet trick-or-treaters with a remote controlled toy car labeled Tesla. Keep a fire extinguisher handy, you know, just in case.