I broke my ankle a few years back and the bones had to be surgically reattached, but the OR was full so they had to set and splint it in the meantime. The shot of fentanyl didn’t do anything, so they gave a cocktail that knocked me right the fuck out and set my ankle. My husband said I shot straight up like I was in the Exorcist, yelled and swore a bunch and passed out again. I remember nothing, thankfully.