Scene: The Ending Montage
As Sam look out into the ocean onboard the American Military aircraft vessel he finally felt safe and utterly relieved that this day was finally over. That the fallen was now defeated and he was no longer a wanted fugitive.
Optimus looked out to see Samuel Witwicky alone at the edge of the ship and decided now was a better time than any to thank him.
Sam heard the steady footprints of his alien friend approaching, "Thank you Sam for saving my life."
"Your welcome, thank you for believing in me."
The two stood quietly for a moment before Sam broke the silence, "So… big bot… old buddy old pal. Super powerful afterburner jets huh."
Optimus smirked, "Yeah flying was invigorating."
"Ah huh," Sam responded his words implying more words were about to come, "So they were pretty fast weren't they. I mean you traveled up to the top of the pyramid faster than the speed of that beam from the sun harvester."
"Yeap, super quick Sam." Optimus responded proudly.
"So…" Sam turned his body around to face Optimus, "You decided not to chase Megatron and Starscream after they ran. I mean that were so beaten they wouldn't have been even remotely a challenge. You could have ended the war you know."
A few seconds of silence.
"Well," Optimus responded in deep thought, "If I did that then I wouldn't have a reason to do my rhetorical speeches at the end of the movies! And I so enjoy doing those."
Sam just rolled his eyes and walked away, Optimus smiling as he began his profound ending speech… again.