Once upon a time , what does it mean?

well for whatever reason i got arrested one night and had to spend the night in jail. So it was this bald prisoner. he was in a orange jump suit and i was beating the crap out of him but he never got a scratch, i was breaking tables off his head and throwing chairs nd whatever i had, and he still kept walkin towards me tryin to attack me. He was so freaking strong and constructable. as he got closer and closer i realized it was just a dream so i gave up and said what the hell. Then i just woke up. What does this dream mean?