What are some crazy things to do this summer!!?

my best friend forever and always even after death is moving to a different CONTINENT in September and this is our last summer together. we want to make a list of 50-100 crazy things to do together this summer. we can't drive so no driving but make things super crazy. we already went on 5 humongous roller coasters together after the other without taking a break until we felt so sick. stuff like that.