It depends. Much has to do with the way management handles this. If they work with fear, it might happen again. But of course this one man or woman is not responsible for this.

The procedure needs to be reviewed of course. Why is such an important event the responsibility of one person? At least two persons should have to press two buttons and it should be made such that one person cannot press them both.

People saying nothing happened - I don't agree. This could cause serious problems for individuals, heart attacks, accidents. This is not without risk.