Blaming the coal miners, eh...you have a political future in the DNC. Albion...maybe as their presidential candidate
Lol
It references the technique coal miners used in the days before high tech to see if a mine was safe for them to work in. They would toss a small bird down as far as they could. If it didn't fly back out, they knew the bird had been asphixiated by noxious fumes underground.