The majority of pax are scared of flying, even (especially) those who sit reading their books/newspapers during the safety demonstration. These people tend to act irrationally when faced with something they don't understand, that's why we as professionals need to reassure them whenever they perceive something to be not quite right. For example, we recently had a centre cabin emergency exit row passenger open the overwing exit deploying the escape slide (on ground) because he/she thought the aircraft was on fire....mist from the overhead louvres was entering the cabin due to high humidity, a perfectly normal phenomena but one which this savvy traveller had never seen before. This, and other situations such as an engineer topping up the engine oil with cowlings open while the pax are boarding, all deserve an explanation to the pax. Otherwise anarchy can take over and the pax become the Regulators such as in this case
