A very nasty, scary looking spider outside my back door when I went outside.
I was petrified. I hate spiders.
Told DH who said I should stamp on it.
Couldn't bring myself too as scared as I was.
Not sure why. I guess partly because I fear repercussions. Karma. God. (Not religious btw).
Will I be punished if I harm an innocent creature however much it scares me? That was my thought when deciding not to stamp.
Spider has done nothing wrong. He's minding his own business outside where he belongs although perhaps a little too close to my back door. 
Maybe I'll regret not stamping on it. Maybe not.
On the flip side my DM is at home 20 miles away in agony, on antibiotics with a leg the size of an elephant due to reaction from a nasty spider bite.
Would you have stamped on it?