Akira,
Thanks for commenting.
I was fortunate to grab the shot at this particular instant, and when I got the slide back and scanned it, I debated whether to crop out the couple on our left and place both the gull and one of his benefactors in a thirds position, thinking it would make the composition stronger.
But I really liked the amused facial expressions of the on-lookers, which I felt added something to the story.
So in the end I went with a triangular composition, and was pleased with the result.
Robert