Bumblebee arrive to the back ally with Sam and Mikaela. He drops Sam and Mikaela then he transforms into his bot mode. Soon after another 4 vehicles arrived. Different colors and model. The red and dark blue semi-truck transform in front them as well as others. Optimus transform into his huge, tall robot. Ironhide, Jazz, Bumblebee, Ratchet and you transform to robot modes. Optimus down on one knee and look at Sam and Mikaela. Then he speak in his deep calming voice.

Optimus : "You must be Sam Witwicky....My name is Optimus Prime. We are autonomous robotic organisms from planet Cybertron."

Sam : "W..what..."

Mikaela : "They know your name?" Ask to Sam. Her boyfriend