I feel as though Stuntmutt should be allowed to explain this one himself:
When I was a kid, I loved Marvel comics. I was always drawn to the ones that said 'Special Guest Star' on the cover, like when Spiderman would turn up in the Fantastic Four, or Thor would 'guest' alongside The Hulk. But Guest Star only ever put in an appearance for a couple of panels and was utterly inconsequential to the story. So I'd generally feel quite disappointed.
I like to think I've managed to capture the true essence of that experience here.