She grabs at whatever clothes are nearest with her free hand, keeping him pinned with the mask shard as she does so.

The moment she has something, she throws herself forward, flinging the clothes up towards the snake's head. She has no idea if it's venomous or not, in fact has some vague idea that big snakes are more likely constrictors, but she doesn't want to gamble her life on that half-remembered fact.

She tightens her grip, reaching for the place where the head meets the body. If she can hold his head down, keep any fangs away from her, she'll be free to pull the mask-blade out and stab again.