a bothersome experience

One minute we were laughing with each other and then we entered the room...
one by one I helped him pick them up by their tails, an put them in the chamber, the walls were painfully clear. They looked perfectly healthy to me, they did not know, we spread white paper on the base and put them in about 10 at a time. the room looked like an ordinary storage room, but the ominious gas line running above gave it the air of a morgue. the little rats started playing with each other and with a deft expression he slowly turned on the gas. with a face, pallid as death itself he explained that he gives a high dose of the carbon dioxide because they die faster and struggle less. they did not struggle, their playing slowed down and then they stretched out and lay dead, we left the gas on until the last little leg had stopped twitching. it was over, they were dead, all of them, laying on top of each other. It was unbelievable, one minute they were just playing and the next they lay still...Death. In the room there was a huge walk in chamber, I asked himw aht was it for, he said he did not know. I wondered what if someone has pushed me into that chamber and had turned on that gas, would I have died as peacefully? I doubt it.
we put the bodies in a black trash bag and walked out of the room, I thought a lot about the selection process earlier that day, I wondered about the randomness of this world.
walking away from the refrigator, I can still see those little wihite bodies , still soft lying on top of one another