He turns immediately he hears that sound, as alert as he can be with drugged energon lurching through his fuel lines, but he stops dead as well, as soon as he sees the face of... his younger self? It can't be. Wherever they are now, that has to be impossible.

"Who are you," he demands, despite the fact that he knows what the answer is. The memories might be distant, but every feature of the mech before him is all too familiar.