OK, thank you for all your replies. Here is what I did and why it went badly:
1) I tried to use Cavit Temporary Filling Material to fill the hole. I think this was my mistake, right? Is this only for dental fractures and not for tooth extractions?
I guess the dentists use clove paste... I didn't have any of this. (WTF is a clove?)
2) Anyways, he was rolling all over the place, in pain and rude... I normally don't tolerate such behavior but the realization that I might have used the wrong stuff (not sure?) made me play Mr. Nice Guy. So, I moved to doing an inferior alveolar nerve block, first with Lidocaine and then with Bupivacaine. He was moving around like an idiot while I was doing it but I think I nailed it. He initially said it brought the pain down from a 10 to 5, and he looked completely pain-free to me. But, then he started amping up again and then switched to saying it didn't work at all.
3) Now, I tried to find something to pack the stupid thing with. All I could find in my stupid ER was iodoform packing which did not seem the right width. I irrigated his socket first. By this time, he was demanding to go. I gave him a shot of Toradol on the way out.
Anyway, the whole thing sucked and took up a lot of my time. Mostly, I'm upset I made a mistake.
Putting in a gauze soaked in Viscous Lidocaine seems a helluva lot easier. After this experience, I might even consider giving a slug of Morphine 10 mg IM about twenty minutes before I enter the room... although maybe not for IVDA guy.