Quote Originally Posted by Verno View Post
Whats Bay's fascination with the number '4500X'? It was the code on Blackout in the 1st movie, and appeared on the engine of the private jet in DOTM.
It's explained in the audio commentary on the Transformers DVD (2007) that 4500 X is the serial number on his real-life private jet. That was his inspiration for Blackout.