Nah, I think its just his nerves. He said it himself that he had it once after his wife died. And that it started happening again BEFORE he shot Saul. So Nah, he just has The shakes.
Agreed. I think that this also shows that he no longer has super human shooting powers, and is a vulnerable (and slightly less useful) character. But I feel this puts him in danger of becoming the next character to be killed. A tragic hero...
Bookmarks