okay...so, maybe its just me...but does no one else remember the hatch door from the season 2 finale? The losties on the beach had the "Quaritine" door fly out of nowhere and slam into the sand.

I have come to two conclusions about this as of last season:
1: The Hatch DID in fact explode...which would explain how the hatch door ended up all the way on the beach flying through the air.

2: The release of the electromagnetic energy somehow "pushed" (for lack of a better word) the door into the air. Like if you try to touch equal sides of a magnet together, they push away from each other. The realease of all that magnetic energy therefore would PUSH the door into the air.

In either case, the position of the Implodies/Explodies still needs to, and for sure will be explained at some point. Its just a matter of time...the producers wouldn't just leave it where its at. No worries there.

On the other side of the explosion argument, you still face the fact that the whole appears to be an outward thrust of energy. I've worked professionally with explosives for a few years...the whole is characterisitc of an EXplosion, not an IMpolosion. (on a sidenote...all of this "impolosion talk" is based comepltely off of what Locke said in passing to Charlie...just so everyone realizes that).

Implosions underground tend to SINK the ground where as explosions underground tend to push the earth away (as can be seen in the screen shot)