He also forgot the fact that Haskell is the real sheogorath, and all the events of SI were staged by him for his own amusemant, turning the CoC into a pawn of his own madness.
I like the way you think.
And then falls in the lava.
To be fair, he's half-crazed and has spent the last several thousand years huffing volcanic fumes. You can't really expect him to have great coordination after all of that.