Calculations

noise/mobile phone call = miscommunication
miscommunication + lack of further communication = misunderstanding
misunderstanding x expectations = dissapointment/confusion
(dissapointment/confusion)2 + sadness = depression
(depression + good will) x (accusation + insult) = frustration

So beware. Don't pick up mobile phones when you do shopping in a supermarket. You may feel very sad and mad after all.