I had two pulled when I was 18 and they suddenly decided to start coming in despite being halfway in for six years. I only had three altogether, one is still in my mouth.
It wasn't fun. I was in a lot of pain because they were growing in fast and I needed to have emergency oral surgery. I was given the option of getting knocked out or just taking a sedative and novocain and being awake during the procedure.
I wanted to get the h*ll out of there so I chose to get the sedative and novocain. the procedure itself was fine. All I felt was them poking around my mouth and mild discomfort. I didn't even feel them putting the stitches in.
When they led me out of the room to lay down, I felt so dizzy

it was pretty funny actually. My mother took me home after that and after I got some painkillers and other than a swollen cheek for the next few days, I was fine.
The only pain about the whole thing was getting the stitches removed. I wish they had used dissolvable ones.