"What was strange is that it wasn't just your average hiding. I have known him to partake in periods of time where he prefers his solitude to wandering amongst the troops," he offers readily (pointedly ignoring that jab about the Decepticons). "The odd thing was his timing and refusal to issue any further commands. We were fully prepared to launch a follow up assault but he seemed unsually reluctant about the idea."

Well. He knows why Megatron was reluctant, or can at least draw his own conclusions based on how their argument went, but bringing that up to Optimus right now seems less than ideal.