I never said nobody is ever nervous but I think people here are over dramatising a situation from the passengers point of view. I have never seen anyone visibly upset or panicked by a go around. I'm not saying it never happens but it doesn't happen as much as some of you would have us believe. I'd say far more passengers particularly enjoy the experience than those who are freaked out.
As for a PA from the flight deck, if they get time then great a PA should be great. If not the PA from the cabin crew explaining that the aircraft is discontinuing the approach and that it happens from time to time, should be enough.
I'm cabin crew so I'm sure I don't have to remind you of the three fundamental priorities: aviate, navigate, communicate. Considering go arounds can be caused by situations that add to the workload and stress on the flight deck, do we really need a PA from the flight crew in these scenarios or do we rather they focus on the first two priorities? I know which I would prefer.