buzz all the way(cool trick with yahoo messenger)

Yahoo messenger being the leading IM is used by most of the people.

One of its cool feature is we can alarm our friends while chatting if they don't respond for a long time.But we can use it only once before they resp.But what if
they doesn't respond for the first time and you want to do it again?

Here's the simple trick:
Just type this in the messenger "ding" between < >,type it any number of times.

So get ready to buzz your friends.