What a job brave man
If you are a grown-up and cooked something leave that regardless of your age if you cooked something then it’s your moral responsibility to safely and appropriately get rid of your coal after cooking burgers and franks.
The only exception to ” safe and proper disposal” is throwing away coal when they are still hot in the closest garbage can. The consequences of this action not just made garbage can unusable but also produced toxic vapors coming from simmering plastic.