Go Nuts! Achievement
Solo mode is the time to go crazy! Go nuts and get the best score!
This is similar to Dance Central’s Freestyle mode, it is a duration in which you simply do whatever you wish. The meter builds up based on variation in wide motions. As long as your motions are wide and varying (not necessarily fast), the meter will quickly build up. I just swung my arms around and got this without any problems. You will likely get this on your first song or through story progression.