Besides his voice and cool faceplate, Optimus Prime's most distinctive feature ... Optimus' semi-truck form is also based on a real truck, but only eagle-eyed fans have been able to determine ...

NASCAR team owner Rick Hendrick also went and got himself Optimus Prime, a custom 1979 Peterbilt truck used in the Transformers movie. Hendrick paid $110,000 for the custom truck, which can do ...