how the children feel when they were released from the community in the giver

When Jonas witnessed the twin's release, he saw his father inject the babies head, after which, it began to wail and cry. Moments later, when Jonas expected his father to clean the baby up and make him comfortable.... it didn't happen. Instead, he witnessed the baby as it stopped crying..... as his arms and legs jerked involuntarily, until finally..... his head hung limp. The baby's eyes remained partially open.