Well. Shit. He knew he should have gone in through the window? But even he can't go forever without sleep, and after a rigorous encounter with a mugger he'd been bone tired. Even spider dudes have to take the stairs when your arms are too tired to crawl up walls.

"I - uh - " He'd had no intention of telling Bumblebee anything, honestly; he'd sort of assumed that Bee wouldn't notice. He's regretting that a whole lot right now. "Look, I have a really good reason for it."

Give him a minute and he'll think of it.