Your compost is of course teeming with all kinds of microscopic life. Sometimes it starts teeming with life you can see, and it might be life that freaks you right out.
What to do? Take a picture and ask a question!
Has something moved into your compost you have a question about? Could be anything from maggots to mushrooms, rats to raccoons, anything living that you're just not sure about.
If at all possible also include a photo. It will really help me give you a decent answer. Ask your question here.
Here are some of the questions that other people have already asked. You might even find the answer you are looking for here. Check them out.