Thread:Comments:SpaceX Falcon Heavy rocket blasts Elon Musk's personal Tesla into solar orbit/Whose idea?

Did anybody ask whose idea it was to use the car as the dummy payload? I know Musk said earlier that they would use "the most ridiculous thing we can think of"; did he come up with the idea of shooting his car into space, or did some employee say, "Hey, boss, you aren't really using that sports car of yours much anymore, are you?"