not sure how you did this, but it's superb!
This is cool. How did you do it? Very interesting.
Looks like the cap was dropped in water and then turned upside down. Very imaginative, author... good job
has the pic been rotated?
Yup, kyricom got it right. It's a submerging cap, heavily rotated by a full 180° in Photoshop. Well, to keep the illusion I had some silver reflector under the tank to get those reflections from below (which became 'from above' after rotating the picture).