Karl didn't have to turn around to see Thug 2 no longer looking at the two suspiciously once the door of the room closed and the heat signature of said third-party slinked off to some other position to do whatever the hell it was that he did at this hour.
Matt almost wanted to point out this strange sixth sense of another guy watching, but Karl immediately shut him up by silently nodding towards the telephone, a commonplace for hidden recording devices, as well as the smoke alarms. A silent prayer went along with the question of whether or not the room was bugged in any way, hoping that things were clean already.
Because it seemed like both Grace and Karl were on the same page when it came to the reluctance to deal with loudmouths and pretending to be loudmouths at six in the morning.