What are the necessary procedures taken when you face a turbulent participant in the attendance during your presentation to the customers?

Thanks 

Actually you should be quiet and absorbed his turbulent 

relax and pick it from there

Acting skills:

Let's get honest truth here ... sometimes we meet with the characters will not be able to make them happy or appease them. Their behavior outside of your control (they have a difficult day, or they're just complaining the nature of their birth) sneaks into the routine you want the usual customer support, and you'll be greeted those customers who they seem to want only to quarrel and attack you.

Remember: customer service when a salesperson or trader with the public makes it imperative to have a basic acting skills needed to maintain his carefree quiet as usual in spite of dealing with wayward customers and always angry