One time in the office I worked in, a fat brought in a blood pressure monitor thingy to check his BP throughout the day. It was a slow day and we were fooling around so I asked if I could use it to check mine (mine is often very low). So as he was "helping" me with it, he said "now, don't be alarmed, your bp might be unusually high, but that's just because you're sitting next to me".