Because the surgeon didn't believe me when I told him I have the redhead gene and am extremely tolerant to all anesthesia. For reference, it took 8mg of Versed (standard is 1-2) before I even felt it before a down the throat echo of my heart, and my last filling required so much lidocaine that it paralyzed half of my face.
He gave me a bunch of air shots, waited a few minutes, I wasn't numb, did it again for like 20 minutes and said, Well you have to be numb now, can you feel this," then made the incision. I told him I could feel that, but he just went right along.
I was too busy diverting the pain to stop him at that point. But honestly, he was so fast that I likely would have been in pain for longer if I had stopped him and made him give me more anesthesia.
But, I basically did a speed run of the pain, because my recovery was almost completely pain and swelling free.