YouTube user Schrobotindisguise posted this video after he, well, got bored (note: this is a very rare occurrence and I cannot even fathom the amount of time one would need to play Portal 2 before actually getting bored. This dude must be a pro. With a lot of spare time):
While i'm waiting for the inevitable challenge chambers and leaderboards, i thought i'd set my own challenges to increase the re-playability of Portal 2......turns out chucking cubes about was sufficient!
As you can see in the video, Schrobot has found a very inventive way of solving the Portal 2 puzzles, trying to ensure that each time he uses one of the stock cubes in the game. Also, don't forget about this summer's DLC, mentioned above!