The explosion lasted too long(maybe the frame duration was too high?), but the effects are great. You did a wonderful job demonstrating the trajectory and the timing is good after the particles start flying. To fix the smoke looking weird at the end, just spread out the semicircles and use thinner lines. Also, try not to put any lines on the inside of the smoke shape as it begins to dissipate. Just kind of hint at where the outline of the cloud is. Hope that helps.
