Go ahead and file this one in the Super Cool Tech category. A Russian blog, Rozetked.ru, posted video of a Galaxy S2 running two copies of Android at the same time. The three-and-a-half minute video takes us through a demo switching between a pair of ROMs while playing music from both, proving that the hardware resources can be shared. After the audio segment, we are shown decently high frame rates on a 3D benchmarking app and Angry Birds. According to the team behind the project, running two concurrent instances of Android only takes about 10% off of battery life while the impact on system speed is negligible.