I'm really bad with any sort of pain, and the first time I was in the chair, the lady was about to start and I was in the process of chickening out when she made me lie back!! My hands were so sweaty that I could barely hold the skin taut for her and I was yelping with every removal (esp at the outside of the eyebrows - ouch!!).
Results were good though and I was a bit better behaved the second time (although I still yelped!). It was also a lot quicker as I only needed a tidy-up rather than a full shape.