Emma:  What 's that for ?
Tommy: To make sure he 's dead . There used to be a time it was hard to tell a comatose person from a dead one , so coroners tied bells to everybody in the morgue . So if they heard a ' ting ' , they knew somebody down there was n't quite ready to go .
Emma: So , why do you have _ one _ ?
Tommy: Well , I 'm ... I 'm a bit of a traditionalist .