This is why anesthesiologists get paid so dang much to stand there and make sure you wake up.
I went in for a correction to a recent filling and told them not to even give me a shot. It only took a few minutes and it only hurt like hell for a few seconds and then was done. At a previous dentist, the assistant gave me a shot and managed to hit the nerve. My face felt like she poured gas on my face and lit it until it numbed. When the shot wore off...I can only imagine that's what it feels like to be hit in the face with a bat.