Recycling by Sandro Loporcaro (Amazo)
In this video, Amazo demonstrates and teaches an unusual effect. 

A can is emptied of its contents, and then it is crushed and put into a bag. Now show a rope and throw it into the bag. 

Incredibly, it passes through the clip of the same can! After the can is removed, the bag is shown to be empty! 

Download the video and learn this effect.