and you just showed how arrogant you are by not saying how to do it and claiming my possible option as an answer when i said it purely by guessing/estimating
Go to the main forum page. Bring up the source code for it. Look for the name of the person that started the topic. Somewhere on that line you'll see something like /topic/2014-01-28/-2. Cut and paste that in to the URL. Celebrate and praise my name.