Feed the worms

A worm that had lived its entire life in a jar would never knowing anything beyond the glass. If you were to take that jar and empty it by the creek would it understand you were only trying to help? Would the worm know that  life inside the jar was so much smaller than the life it was intended? It's more likely the worm would only understand that his old life was gone and that its new one was so much scarier. It would miss the glass.