ONCE stands for "Organización Nacional de Ciegos de España" which translated into English means "Spanish Organization for the Blind People".
It is a very strong organization, which owns TV channels and other important business.
One day they decided to found an airline company.
As the passenger approached the counter to buy a ticket he realized the clerk was a blind girl. He started suspecting.
He became more afraid when after boarding the plane he realized that all of the stewardesses were blind too.
Then the crew, pilot and copilot, came into the plane. They were wearing a pair of very dark sunglasses, carrying white sticks and were led by a seeing eye dog.
At the end of that runway there was a steep hill. The plane started rolling and gaining speed but without lifting off. The passengers got desperate and scared to death as the plane was approaching the end of the runway and then, they all at once screamed loudly.
Through the public address system they heard the voice of the pilot:
"Now!"
And the pilot said to the copilot:
"Wow! What a crash the day people do not yell!"