Is this an complete thought or an incomplete thought

running as fast as he could, timon made it to class on time

Incomplete thought, why was he running to make it to class on time?

is basically a good source of getting and others by what you know for example if someone asked a question and you know the answer you could answer it and get some points or if you need on a question you could make a post about it and wait till someone answers it or just look up the question and see if someone else has asked about it