Magic and Wizardry

I've always thought that the whole series is filled with moral messages and smart details, but what I'm about to show you, extended the possibilities quite a little bit...
As I was watching one of my young wizard Harry Potter favorite movies: HP and The Prisoner of Azkaban, on a soon to be obsolete DVD player, I was compelled to see the whole movie to the last credit... A practice that is quite uncommon, not only to me but to every person I've met. That said, as I was watching the credits scroll in the screen, something interesting caught my eye around 2:14:10. A somewhere in between an Easter egg and a subliminal message of what appears to be... (check out the lower left corner)

Everyone knows how the Marauder's Map works, right?? So, who are those on the lower left corner?? 

AHEM... a couple having a good time in the very corridors of Hogwarts School of Magic and Wizardry.
Mind to take a look for yourselves? Go ahead and check it out! There's just no way this could've been an honest mistake. This was intentionally engineered! Even the corresponding feet move at the same time.
In the light of this discovery, now I wonder if it is possible that I've missed any other "detail" such as this one in the other HP movie installments.
Now, if you'd excuse me, it's time for me to go see HP7...


Photo credit: Harry Potter and the Prisoner of Azkaban movie. Fair use assumed...