If there is one thing a snake DOESN'T like it's being grabbed or restricted in any way. The snake appears to be in "flight mode" when you grab at him.. Also, if the snake were in pain you would probably be hissed at and then eventually struck at doing that over and over again... This clearly looks like a snake that is not happy about whats going on in my opinion.. I will support the sentiment that this is a snake not a cat or a dog.