Watch: R2-D2 Is Sad When Obi-Wan Kenobi Doesn't Remember Him on Tatooine
I know there are bigger Star Wars fans out there than me, so maybe they could answer this question. When Luke Skywalker meets Obi-Wan Kenobi on Tatooine in the original Star Wars, why doesn't Obi-Wan remember his previous exploits with R2-D2? The real answer may be that George Lucas might not have thought far enough ahead at that point to know he wanted to actually make the prequels one day and that those two would have crossed paths at that time in the story, but does the franchise itself offer a reason? Is it just Obi-Wan's memory going bad?
In any case, YouTuber Jeffim Sheroky has put together an amusing little video that shows R2 having sad flashbacks to all of their adventures together set to Gary Jules' haunting cover of "Mad World."