This is least discussed Easter Egg of utorrent. There is a hidden Tetris game in utorrent called as utris. As you all know utorrent is one of the most popular torrent client but this hidden game doesn't represent its serious image. This game must been made by utorrent developers for anxious downloaders to kill time.

You can play tetris by pressing "t" in "About utorrent" found in help menu.

Go to Help > About Utorrent > press t .

Now you can play utris whist downloading !!!

Credite : torrent-secrets.blogspot.com/