ECG app and very painful noise?

watchOS and Apple Watch Apps

Hi guys. So my series 4 came in today, and I'm testing everything new that I can find. I almost accidentally tested fall detection when I tripped over something the cat knocked into the floor, but that's not the point. When taking an ECG, do any of you get this horrifically painful sound for the duration of the ECG, or is that a Watch OS 6 thing?