I've noticed that sometimes David Kract (a flickr admin I believe) adds a pic of mine to a group called 'in explore' which states that;
"Photos are added to the group pool by users accepting the ADMIN INVITATIONS ONLY. You cannot add images directly to the group pool yourself. Your image must have been in Flickr's Explore to get an Admin invite."
So currently this pic of mine is in the group;
However,
I've had a good look in Explore and haven't seen it featured there, and also another thing is my views and favs are very low for this pic, usually when I get a submission into Explore its very obvious, the email notifications start pouring in from people I don't know.
EDIT: Found it, so I guess this is just one of those Flickr Explore entries that have had no traction at all. That's a first for me, didn't know that could happen.