Some answers for Chucks:
1 Yes I do hold some kind of professional licenses, I'm even above level 4. Still, I'm certainly not as professional and experienced as many of you since my medical class 1 doesn't include a prostate inspection.
2 Vz is not an indicated airspeed, it means vertical speed since it is related to the vertical axis kindly explained by BOAC. The Z axis is usually used by those eventually evolving in the third dimension.