Anonymous

What got stuck behind what?

Anonymous

If the front and back are stuck together, use a twisting motion.

Anonymous

Now go back to your question and tell us what "some" you mean - maybe "some time"? And stuck behind what? Your picture shows two small objects which might be earrings, possibly photographed on a wooden desk or table, and they are clearly visible, thus presumably not "stuck behind" anything. When you have retrieved the missing earring, go to your teacher of English and get help in expressing yourself clearly.