Every now and then I involuntarily remember that for the first of the Michael Bay Transformers movies they had two real trucks made for Optimus, one that had the Peterbilt logo and one that had the Autobot symbol.

And the one shot that both trucks are on camera they screwed it up so Optimus scans a truck with the autobot symbol, turns into a truck with the peterbilt logo, and in the next scene has the autobot symbol again.