10 ideas on world worst ending.
1. Every space would be filled with water.
2. Animal eating out humans to satisfy themselves.
3. Heat wave increased causing wild fire, tree fire, every open wood fire.
4. People started hearing extrapolation of sound, thus causing hearing damage, mind loss and turning towards death without any newer life.
5. Every electric device causing malfunction & giving shock to humans.
6. Clean water scarcity makes people buy out the water, fight out for water, ending their life.
7. Machine taking control of people life, using them as batteries and their survival.
Well it's matrix.