I will never do that again

one thing that comes to mind is i will never use a rope swing again. two summers ago i was out with some friends to a creek. we were having a lot of fun. we walked down the creek a ways to spot were everyone goes swimming at. it was a busy spot today and has we were playing around we seen a bunch of people use a rope swing so we wanted a go at it. everyone had their tune. i did it a few times myself and on my fourth time going i swung out then  hared a pop then something slammed into the top of my head just before i hit the water. as i came out of the water i could feel something a little off and everyone was looking out with a look of shock on their faces. my friends ran over to me.