Movie 1. (4.5 MB M4V) Evolution of the system when the magnetic field is linearly increased. The particle area fraction equals 0.2 and the dimensionless acceleration equals 3.32. (Movie in real time) Movie 2. (2.7 MB M4V) "Dissipative" regime (all parameters fixed). The particle area fraction equals 0.2, the dimensionless acceleration equals 3.32, and the magnetic field is off. (Movie slowed down 30x) Movie 3. (2.7 MB M4V) "Quasi-elastic" regime (all parameters fixed). The particle area fraction equals 0.2, the dimensionless acceleration equals 3.32, and the magnetic field equals 88 G. (Movie slowed down 30x) Movie 4. (2.6 MB M4V) "Crystal" regime (all parameters fixed). The particle area fraction equals 0.2, the dimensionless acceleration equals 3.32, and the magnetic field equals 208 G. (Movie slowed down 30x)