There are some things that the report can't fully anticipate, which it readily acknowledges. These are the surprises that are littered along our future path. There are tipping points, like the collapse of ocean currents or ice sheets, which we can't put back together when they all fall apart. Then there are compound events–heat waves layered on wildfires layered on droughts, or flooding coupled with heavy rainfall all sprinkled atop sea level rise. These multi-faceted events could happen independently, or they could happen coupled with a tipping point, or two, or three, and researchers still don't have a clear picture of what the result of those deadly combinations might be.