My wife and I had a little white coat syndrome re higher BP when taken at the beginning of an appointment with a doctor and lower at the end of the appointment.
When I take my bp med the night before, the bps are in the normal range pre and post visit.
Back when I was young and thin, and really for a long time thereafter, my rest BP was in double digits (both systolic and, uh, apostolic or whatever). The first time I remember getting my BP taken was for the physical for Boy Scout camp, and my nerves about that may have actually caused a bit of a BP falloff — it came out 80/60. My doctor at the time was still the doctor present at my birth, and it surprised him.