Dream About Hospital Alien Trapazoid Disappearance Polo Game

I had a dream of being in a hospital and being a guard there was like a human alien in one of the rooms and I went in and when I grabbed the human alien it turned into a trapazoid and it disappeared so I walked out and I appeared in the front of the hospital walking in it was a hospital I seen before and there was a announcement and I dident quit hear what they said I kept walking down a hall and when the announcement kept talking everyone started running to a big room it looked my Teachers Band room but 10x bigger and then all the kids were talking to eachother and they started yelling Polo and they started running and I followed and everyone was yelling Polo so I’m guessing I was playing Marco Polo