In the poster for Bill & Ted's Excellent Adventure, it looks like the AI caught "time travel" and "phone booth" and tried to draw a whole bunch of TARDISes.
Back to the Future has what looks like a TARDIS as well. Although… so does The Matrix, for some reason. Phone booths did play a minor role in that movie, but I kind of doubt that’s the reason. It would be interesting to see the exact text given as the prompt for each movie.
