A large clothespin
This giant clothespin was installed in Chaudfontaine Park, Belgium. When a tiny object is made big, earth becomes pinchable cloth.

A surface is treated with a cup

This looks like the acupuncture technique of cupping, where a cup is placed over the skin and a vacuum created by burning an alcohol soaked cotton ball to consume the oxygen. Except of course that this technique is applied to a solid wall.

Wall

Someone is trapped inside this wall and is either actively trying to escape, or has literally "hit the wall."

A canvas woman

This partially unclothed woman seems to have accepted her fate.

– Turkish artist Mehmet Ali Uysal>>
– Giant Clothespin Sculpture, Bored Panda>>