You are one of the few scientists working on a cure to the Zombie infection which is under control in the lab, currently there's 5 zombies of people who have agreed to the experiment. Two people that haven't agreed were criminals who were sentence to death, now both are tied on a bed and the first prisoner gets a shot of the vaccine then the second one gets it as well, after 10 minutes one of them began turning into a zombie

Prisoner:"Shit shit! He'll eat me!"