I wrote a dark/horror short story for a literature project and it was described as "a thing of nightmares" (in reference to the content, the quality was "fantastic"). A different project allowed me to make a sequel, and I was asked to make a third when I could (they quite enjoyed it). While handing in a copy of that, I said "here comes the nightmare express!" and the rest is history.
I was originally thinking of my oldschool nickname..."Tank", I think it was.
But alas, too simple a nomenclature for an individual such as I.