Laughing – when there is nothing else you can do.

“Tragedy is when you cut your finger.  Comedy is when you fall into a sewer and die.” – Mel Brooks

Sometimes something so terrible happens that it’s impossible to feel bad enough relative to the other things you thought were bad.  What can you do? – Laugh.

“Dang.  Oh well.  Lol”

Mel Brooks also said – “Humor is another weapon against the universe.” 

Use it when you need to.