ooh dear postage, im sorry youre in such a horrible and difficult position at work. not nice for you attall.
he shouldnt be allowed to get away with this behaviour,
he sounds a right nut job, and yes, his attitude and aggression would definately worry me slightly....
i really hope things improve for you postage, without things getting particularly unpleasant between you both.
its not fair you should be going through this.
i wish you all the very best x