The pressure of the moment can cause someone to kill someone or something

The leniency of consideration might treat with more kindness

Which is to be desired. Or at least often to be desired.

But if my house is on fire and you notice, I wish you would kill

That fire. But if my hair is on fire, while I'm sure you'll be enjoying

The spectacle of it, act quickly or don't act at all. But if a sudden

Jarring of us all out of existence is eminent, do something.