Alan Greenspan talks...people listen
http://http://www.nytimes.com/2007/09/17/business/17greenspan.html?_r=1&oref=slogin
"KNOCK AS IF YOU MEAN IT...THEN OPEN THE DOOR GENTLY."
http://http://www.nytimes.com/2007/09/17/business/17greenspan.html?_r=1&oref=slogin