I got 30+ LP per win. Gold III - win 3 times + 2 promo. Gold II - win 4 times + 2 promo. Gold I - win 4 times + 3 promo.
I won 17 times in a row. Needed one more game to hit platinum. I got complacent. I made mistakes. I lost two games. I felt the pressure from the make-or-break game. I put my full attention to playing perfectly.
Last game? I get support. The game is out of my control to win. But I told myself I'd do what I can as a useless support in order to get platinum.
I got 3 kills as support and mid-laner raged at me. But I knew I needed this win. So I apologized. I warded the entire map. More wards are better right?
Then the time came: http://i.imgur.com/AoWZwAg.png
I also got into an awesome platinum league "Galio's Lightbringers".