Dream about dead girl

Date: 9/18/2016

I had a dream we were going on this field trip for something with about 30 kids maybe? there was a tunnel thing we went to. It was very slippery and it was supposed to be a subway entrance that was closed down, but then turned into a popular place to hold singing events? Someone said that a girl dies right there from a plane accident from crashing, and pointed at a spot where new tar and paint smeared in a line. Gross. The girl started outlining it with tape, and I had to walk away. I think I woke up then.