S2E2 Spoilers: Anyone else think it was interesting that Mark…

...dips out of work at 9:15am and oMark doesn’t seem to be asking any questions about that (as far as we've been shown)?

I don’t mean right as he gets out of the elevator of course, but after. Seems like he’d be really on edge for anything out-of-the-ordinary to go down at work that could spook him, unless he somehow knows that was going to happen... or experienced it firsthand