Some kids act out like this when mommy or daddy drop them off at day care. One of the best ways to escape w/o him getting upset is to take him in and have him focus on something, like a toy, another child, etc. and then slowly slip away and don't announce that you are leaving. In my nephew's case, that is what his parents did. He also had this attachment to a baby blanket for many years. When my nephew started school, he wouldn't take the blanket w/him, but minute he came home, that blanket was "attached" to him. My mother slowly snipped away at the blanket until two threads were left and one day, they disappeared and he never acted out because he couldn't have his blanket. You have to handle this very gently and slowly. It may not because of the crisis, but maybe something was said to him that made him scared to go to daycare. Maybe someone is being a bully or maybe the daycare provider has teased him, but you have to work w/him and keep his focus on something in the room and slowly, slowly back out of the room and go to work. Hopefully, he will outgrow this.
Also, I want to mention that some kids go through a period crying jags. Their feelings get hurt really easily. I can't remember at what age, but I want to say around 6 or 7. It's all part of their growing up.
I do hope that you can figure out how to get to the bottom of this attachment issue, but it is very normal for some to do this.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
