A blond and her blond boyfriend went for a walk along the river. The blond walked across alone on a wooden bridge. While on the other side of the river, the bridge fell down. She called across to her blond boyfriend telling him that she couldnt get back. He yelled in response, Wait until dark, and I will shine my flash light across the river. Get on the light beam and walk back. She replied, No, Ill get half way across the river, and you will turn the light off.