Guy in my area, Billy Carr (formerly of fusion trio Beanstalk), is a quite gifted bassist and drummer, and he sometimes plays both simultaneously. Very credibly, I might add.
Posted this in another thread but worth a view- bass AND keys at the same time!!
I never noticed this thread either - being a viewer of the site for 6 years. There is a local guy here in Wisconsin that plays the bass and the keyboards AT THE SAME TIME. I had seen him several times and have asked how it's done. He claims telekinesis or some non-sense but it's got to be something.