WOW I don't even know what to say about this. Fact is, banging a rat into a table or wall just as frequently ticks them off or breaks their back and leaves them alive and in agony as it does kill them. Cervical dislocation or CO2 asphyxiation are both humane methods of euthanizing rats. You, as a human being who has the ability to rationalize about what you're doing to another living being that is at your mercy, have the obligation to make sure you're humanely killing your feeder animals, instead of subjecting them to unnecessary pain.