I found out that Versed is known as a "truth serum". You are awake but don't know it. You will answer questions and respond to commands but you don't remember doing it. Dangerous. Lol They mix it with a sedative of some type.
I remember when they scoped me at Oschner before they removed my colon. They were checking to be sure I hadn't developed cancer due to my ulcerative colitis. I woke up before they were through and watched somebody walking through a cave on TV. Lol

I hope your shoulder surgery goes well.