L450…first major problem!!!!

Yesterday, the engine of my 2 week old L450 just stopped when I got off to do some spraying. I checked the fuses and battery terminals but the digital display would not even come on.
I phoned the selling agent from out in the middle of the paddock, about 3km from home and started getting angry with him and telling him what a heap of unreliable rubbish he had sold me. Even more bad words when he told me I would have to bring the machine back to him at his workshop which is 100km away.
As a parting comment he said "have you checked the kill switch?". Well, what do you know? It was switched to the great big "X"!!!!! Very apologetic I was! Eating the "humble pie" as the saying goes.
Lessons to be learned?
1. Stay calm and think through the problem. Don’t get angry!!!!
2. The kill switch doesn’t just stop the engine! It cuts power to the whole system.
Well, I think I have learned the second one but the first may need some self control.

btw….have any of you more experienced riders actually used the kill switch in an emergency. This is the second time in 20 years riding that I have accidentally hit that switch. I am wondering how necessary it is?