He recognizes that voice--anyone on the Autobot team recognized that voice. Optimus Prime's bodyguard himself, Ironhide. He had to admit, it was a little surprising seeing him up and alive again, after everything that happened on Earth. But...

He'd seen him on Cybertron when Shockwave tried to take over. There was no mistaking that Ironhide was alive. "Ironhide?"

He swirls his drink a minute, before looking out at the dance floor. "I'm never usually sober at these things. It's hard to know what to do."