You should try using a faster frame rate, for starters. This looks slow/choppy. It's also short, pointless, and pretty much has no detail. I'm sure anyone could make something like this in less than a minute. You should try to make your stuff more worthwhile or it's just gonna get blammed like this.

I'm sure you're capable of MUCH MORE than this! If you're going to do a clip of someone exploding, at least include some of these:

1. Different people exploding.
2. Different parts exploding.
3. Better animation. (More detail)
4. Longer clips.
5. More clips.

I truly do believe you're capable of better and hope to see you among the best some day.

Seriously, we need more to work with here. Try harder, make more and practice more. I've made a few things but they sucked and now I am not uploading anything anymore until I'm really happy with it.
What i'm saying is keep practicing and add more to it, there are too many animations that have made it for some reason that have no real value. A head growing and popping (poorly) won't be accepted. So keep practicing and dont give up.

Also you misspelled EXPLOSION.