Silly but warm story about sometimes chilling subject matter. Historical figures from the history of black people in the US, from the time of emancipation until the time of President Obama, time-travel to historical periods other than the periods they actually lived in. Makes for humorous confusion and an enjoyable movie. If you name is O'Bama you are probably Irish, no? There is a name for the story-telling technique of putting a person from one place or time in the environment of another place or time. Whatever the technique is called - that's the technique that was used here.