Optimus was standing next to Megatron, Black Arachnia, and others, some Autobots, some Decepticons, you name it, before he lowered his head and grunted slightly. After a small moment, some asked Optimus; “Why’d you moan?” Optimus responded; “I didn’t moan— I just— grunted—“ Then, the bot who asked Optimus said; “That’s the same thing.”