It was several days after the whole Loki incident had ended, and Thor had decided to stay on Earth, for reasons known only to him, me, and soon you. He had his own rooms in the Avengers headquarters, and life was good. He enjoyed the food, and had discovered the wonders of football and hockey, which I know nothing about, so don't ask me. Anyway, he loved them. The other Avengers were always off doing their own thing. For example, Black Widow (a.k.a. Natasha), and Hawkeye (a.k.a. Clint), who were busy going on super secret spy missions and probably having a lot of sex. Then there was Bruce (a.k.a. The Hulk) who was bottled up in his lab being a nerd. Captain America and Tony were most likely avoiding each other and pretending that they hadn't fallen completely in love. Can you say denial. I can say it. It's a pretty easy word, just three syllables. You should try it. Denial. Denial. Denial. Captain America and Tony are in denial. Denial.
So back to Thor. He was getting bored with food and football, so he went to visit Bruce. He, unfortunately, was unaware that Bruce was experimenting with huge amounts of gamma radiation. Enough to kill your average human three times over. Fortunately, Thor is not your average human, so it was only enough to kill him one half times. He got half killed. Half destroyed. Half dead. You get it. He almost died. But he didn't! Oh no, what happened to Thor was much worse. Heh heh.