Anoscope After Procedure Question re: Appropriateness of Method.

I am male, 81 years old in good general health despite being on warfarin since 2007 after aortic valve replacement and having untreated (by choice) prostate cancer (now at T3b) diagnosed in 2009. I was having an anoscope by my PCP to see if my hemorrhoids qualified for banding. This was previous to a scheduled colonoscopy. When the time came to introduce the anoscope, she had me stand, supported by the exam chair with the left leg forward and the right leg back. She had already summoned a male nurse to help with the procedure. She lubricated the anus, and, without saying a word of warning proceeded to shove the anoscope into my rectum. Shove is not an exaggeration. The discomfort was strong and I kind of yelped from surprise and pain. I have never had such a violent action performed without warning. I have survived heart surgery, gunshot wounds and serious motorcycle accidents, so I have a variety of experience with medical treatment.  Since I didn’t bleed after the procedure, and there was no lasting damage, I didn’t complain about it since I don’t know if the way she handled the procedure is standard medical practice. I have been thinking about it since, and something doesn’t seem right. So, I came here to see if I can get an answer to the question: Was her method standard, or was it poorly or even worse purposely done?