Mo, being -- well, Mo, but more importantly being agent CANDID, whirls around on instinct without even realizing she's doing it consciously.

(If she had been thinking, no doubt she would've made a comment about Peter-Fred actually noticing something happened without taking at least ten minutes to catch up.)

Instead, she's grabbing for her violin case, which she'd put only just out of arm's reach, leaned up against one of Bob's filing cabinets. Not knowing what the situation is, she's only picking up the case and running out the door and in the direction of the scream, instead of taking the violin out.

It's a judgment call.

It may or may not be the right judgment call.

She doesn't look to see if Bob's following.