I ... got really busy?

_{[... BUT MOSTLY SHE JUST GOT SORT OF LAZY and Snake hadn't been around to whip her into shape.]}

Don't worry, I think I got the stealth thing down. _{[She'd always been pretty good at being sneaky to begin with... Snake's professional tips had just honed her skills.]}

Most of what I know, besides what he taught me is... well, I just learned it on the job, more or less... _{[It's probably obvious what she means by 'on-the-job'. He's seen her workplace.]}