Uh, it would be wise to see and doctor immediately! The electrical shock may have damaged your internal organs, even if there are no apparent external burns.
I was going to say that too - those Lichtenburg scar pictures that are linked don't look good. While they might seem 'cool' aren't those just 3rd degree burn scars? You have to wonder about the 3rd degree burns on the inside that you can't see.
I know that he didn't receive any scarring externally. My point was that anything that can do things like that externally could have resulted in very bad things internally.
Yeah, I'm not a big fan of hospitals, but this is one of those potential "oh, yeah, internal bleeding... that wouldn't have been quite such a problem if you had stopped in, you know, a few days ago, genius" moments.