When Things Go Bad!

Too many times I have seen people over estimate their skill, or conditions. I have helped on chase, track downs and killed the animals. Sometimes they are screaming in pain, eyes wide open in fear.
I have learned to not trust my eyes as to distance. A mirage, wind, headache, excitement, my bad lungs or ego just ruin things, lasers help.
If I am not sure, I don't shoot.
Thank you.