Someone once said to me or I read ''every approach is a set up to a go around, only convert it to a landing at the last minute.''
I remember my first time on the Eurotunnel, the PA before leaving had mentioned about short stops/slowing down in the tunnel that were perfectly normal, had I not be warned I would have been a little edgy about it when it happened.
Even a quick few words to say 'nothing to worry about and shall be landing in a few minutes'' can ease most passengers.