Optimus watches Shockwave's hand slip out of his own, and almost by instinct, he starts to reach for it, only to let it fall short and back down to his side. His eyes can't match up with Shockwave's again, not without a tinge of guilt shooting through his spark.

"Tired is a good word for it." His voice is even softer, every sentence more like a suggestion than a statement.

"But we can't rest just yet."