I'm not sure how I planned to demonstrate this "idea" from a few years ago, but it might make a good high school student film.
There's the big 9/11 kind of terror, then there are the little terrors of everyday life. Two that occurred to me walking around New York are:
- You slip and fall face first onto the pointed base of a ripped-out street sign.  (The one pictured above is neatly sawed off, but still dangerous...)
- A fire escape ladder is shaken loose by vibrations from a passing truck and one of its feet lands in your head.
Luckily the metal squeezes by your brain, but you are stuck there like a specimen on a pin. You ask the first person who walks by to get the cellphone out of your pocket and call for help. They get the phone, then your wallet and watch, and walk away without a word. You stay there forever and become part of the urban landscape, covered in vines.
Since that sounds sort of final, maybe the student film could work up to it, beginning with an innocent walk, then progressing to the suggestion of a flesh-eating virus left on a park bench, then onto a subway car with locked doors that breaks down in a tunnel with a tireless Mariachi band. After all that, being buried in vines would be a relief.