They can be scary if they attack you with invisibility. You can add your inventory some stim berries but if you are in their nest, unfortunately your uneasy death on the way. First they biting you and after that they are eating. You don't have chance in this moment. If they was made like real forms of them, you can't be close them, because in Documentaries, calling about them "stronger than rex". In that way it is good. But if only they can be larger and stronger. Get away from Titanoboa.