Its sarcasm. You may want to pay a bit of in depth attention. ;)
Internet sarcasm is a lot like trying to translate puns into other languages, most of the time it just doesn't work.
That and most of the people on this board aren't particularly funny, so their sarcasm tends to suck.
"So...the orphan attacked you?
"Aye"
"And so you cut him down with your axe in self defense."
"Aye..."
"I don't believe you."
"Damn...would ye believe that th' orphan was an alien?"
"No"
"Damn."