Rest In Peace!

Shoot! My bad luck continues.
So I've been stretching and decide I want to try and ride for one hour. I get all brave for the cold night and mount my favorite steed (steel cross bike). About a mile into it, I stand up and it feels like my front wheel snaps, so I take it to the ditch. Now my back is hurting from going all Jan Ulrich endo like. I take my light and try to figure out what happened. Wheels are true, fork is still in one piece, frame looks fine, nothing. I come home very carefully and look it over about three times, then I notice it, fugging cracked head tube. How the heck does that happen? Now I'm all bummed that my best fitting bike, that I have fallen in love with is going to Bicycle Heaven. Is there any hope of a warranty for my LeMond?