hostultra.com is doing some odd javascript games, which is probably what's causing hostalarm to trigger. It's got a javascript which is trying to make popup ad windows appear.
However, that's not what's causing the download weirdness. It's rather that hostultra's doing referrer checking. In a command-line fetch,
wget http://www.hostultra.com/~AngCobraFics/atotw113.txt
fetches the "oops" page, whereas
wget --referer='http://www.hostultra.com/' http://www.hostultra.com/~AngCobraFics/atotw113.txt
retrieves the text file normally.
However, that's not what's causing the download weirdness. It's rather that hostultra's doing referrer checking. In a command-line fetch,
wget http://www.hostultra.com/~AngCobraFics/atotw113.txt
fetches the "oops" page, whereas
wget --referer='http://www.hostultra.com/' http://www.hostultra.com/~AngCobraFics/atotw113.txt
retrieves the text file normally.