He had seen doctors do that sort of thing on TV before. The rubbing the weird goo all over the stomach, followed by a circular sort of thing that was obviously used to find the heartbeat. Making note to Google the point in what the funny looking stuff she had painted all over Heather's stuff was for later, Sam ticked his gaze off toward the screen thing and stayed quiet. He had, for the most part of the day anyway, but now he was doing it for the purpose of listening, rather than trying to keep himself from getting sick.
The faint noise that followed was hardly something that he could have anticipated. Holding his breath for a moment, Sam turned his head to the side and strained to hear it again, even as the doctor cranked up the volume.