I wouldn't film anything that involves a snake and my child. I would look for a way to get out of there as fast as possible. In fact, I would call a wildlife removal service immediately rather than amusing anything. We had a case in my neighborhood where a kid ended up in the ER due to a snake bite and I would never take any chances. It's much cheaper and safer to call an expert that can deal with the issue and take the risk for you. I'm pretty sure that the mother of that child would also agree with me after the terror she went through.