What Jonsi said seems quite likely. It is also possible that someone who bought in the range 0.02-0.025 decided to reap some profit by selling in the high 0.03's or low 0.04's. Could've been someone who bought in at 0.08, endured the drop, and bought back in at 0.02-0.025 to even out their loss.

Still, the sudden price rise is interesting...maybe there are some news coming soon?