Why would engine that was idling then suddenly die?

Idling too low or a bad lock-up torque converter solenoid.

you are flooding the engine

Change your fuel and air filters.

try replacing mass air sensor

It is likely that if it was during an idling condition or low rpms your EGR valve could be sticking open or faulty.

Some animals would die. (some species would die)

Eating poisonous plants.

We would die... and then die... and still die...

Idle control motor defective.

I would clean, and possibly replace the Idle Air Controller. It regulates air to the engine to maintain an idle. It is bolted directly to the throttle body and will run you about $70 USD.

nothing it proobaly would die

The most common cause for an engine to die out, while idling, is the idle speed is set to low. You can adjust the idle speed with the fuel injector vital screw.

its because your really fat go on a diet u fatty.

After warm up, my car would die at idle and would decelerate when I pushed the gas pedal hard. I replaced the camshaft sensor and it fixed the problem.

It would run out of energy and die.