Megatron sits up to finish the rest of the cube in hand, stopping his drink mid-sip after seeing the syringe eject from Ratchet's wrist. He swallows the energon, cautiously, after getting a good taste of it, and turns to face him.

"Whats that?"

As tentatively trusting as he was with Ratchet out of necessity, he still wanted to be walked through what exactly was being done to him. The more invasive, the more he wanted to know.