The Counterproductive Jerk
You can learn a lot about a person by sticking a needle into them. I've seen 8 year old kids lie perfectly still without a whimper as I inject a painful anesthetic into their lacerations, and I've seen plenty of otherwise seemingly normal grown men and women scream, flop around, and bawl for their mommies with the first tiny prick of the smallest needle available. "Are you done yet?" they will sob, shuddering. Umm, no...I have to actually inject some of the medication for it to work. Try to keep still. The vast majority of people fall somewhere in between the two extremes.
I understand that the ER can be a scary and uncomfortable place, and I always try to make the process as painless and relaxing as possible for my patients. If you seem like the excitable low-pain-tolerance type and you have a driver, I'm happy to give you some medication to make the procedure go a little smoother. I have no problem seeing a few other patients for a half hour or so until you are mentally and pharmacologically prepared for the little 27 gauge needle and the torturous lidocaine injection that in your mind must burn like Satan's pitchfork.
And after I've finished the 8 year old's laceration and you are ready to accept my trident of hell, again, please try to keep still. But if you are going to jerk anyway, at least try to jerk AWAY from the needle. Ouch, that's gonna leave a mark. At least it'll be 1.25 inches deep, so it won't show.