Hopefully he will stop doing this before he gets really stuck and needs emergency assistance. Here's how I see it going...
911 Operator: "Hello, 911, what's your emergency?"
Me: "My sons head is stuck between the bars of a railing"
911 Operator: "His head is stuck?"
Me: "Yes, Ma'am"
911 Operator: "Have you tried to remove his head?"
Me: "No Ma'am, I think he needs it"
911 Operator: "Oh, right, well help is on the way"
Me: "Ok, thanks!"
So, that's what I see happening in the near future if he keeps up this current behavior. As always, I'll keep you all posted!