Sunil was illustrating the ease with which his company's newly designed lawnmower can be operated. however, during the presentation, the lawnmower stopped working. what is the most appropriate way for sunil to handle this situation?

Sunil should use humour and accept that such mistakes do happen.

Humour and embarrassment are closely related and affect someone's social life. In embarrassing situations, the onlookers empathize with and seek to diminish the other person's embarrassment while some people may seek to inflict more embarrassment by laughing and enjoying the situation.  

Humour, on the other hand, transforms embarrassment by making the situation less tense and less stressful. The ability to make jokes and do funny gestures reduces the awkwardness between the speaker and audience and also lessen the tension.  This was the method used by Sunil to handle the situation in proper manner when the lawnmower stopped working.

can you give a picture of the map, i'll be able to update my answer!