You and Optimus Prime walked into Wheeljack's lab because both of you were looking for Bumblebee, as you and Optimus came into the lab, you see Wheeljack holding Bumblebee in his hand, almost like Bumblebee got shrunken down form his original size

Bumblebee: Sees Optimus and you Oh... hey guys...

Optimus Prime: How did this happen...

(Your response is...?)