Wow, this brings back memories. OK, here goes....
I remember them sliding a metal plate under my a$$. When I asked what this was for, he said "to ground you"... uh oh.
And yes, if they use the metal caps on the vas, they will cauterize them with electricity. I was drugged out on a big valium in advance, and I started laughing uncontrollably when they did this. When he stopped to ask me what was so funny, I said "HEH! You're welding my balls!"
Not to be a pu$$, but let me tell you, the anesthetic shot in the balls is incredibly painful. Like getting kicked by a horse and having the pain sit for 60+ seconds. Once that's done, it's all pretty so-so, and I had a pretty funny drugged out conversation with my urologist. He told me to come back in 25 years when I needed my prostate out, he does great work
I was unfortunate enough to suffer two infections due to this operation. This also hurt, fever, nausea, etc. I would not rush it, you'll be doing the "vasectomy shuffle" for a while, which is a term my wife coined after having me glide around the house in my slippers for a week or two.