Barney lifted his eyebrows. The cogs in his brain were already working overtime, thankful for something awesome to think about rather than dwelling on less-awesome subjects. "That's good to know, York." Barney grinned then, because it was..in fact..good to know. Just in case.
Never know when you need someone to get you out of a jam. Or get into a jam.
Either way, he took another drink and waved his hand about. "So how do you like the past? And..Earth?" He was assuming that future-man was also alien-man.