It was basically Brandon Black bitching about how trying to change MRO (method resolution order) in Perl 5 was a pain and could someone do something about it. I recall the reason being that it was a biggest cause of slowdowns in Moose. Nicholas Clark dared him to write a patch, which he did. The rest, as they say, is history.
So sort of both, really :)
• another intruder with the mooring in the heart of the Perl