Funny Junk

Guide:“I welcome you all to Niagara Falls. These are one of the world’s largest waterfalls . Moreover the sound intensity of this waterfall is so high that even the 20 supersonic planes passing by can’t be heard.
On listening this all the ladies present there started talking about Niagara Falls.
So the guide got irritated and said “Now may I request the ladies to keep quite so that we can hear the Niagara Falls ?”