It looks great, the overall look is quite impressive !!
On the video itself, the heli looked to small compared to the rest of the environment but maybe it's because of the small video window in youtube I watched it through ^^ The explosions are oke but could be refined, it doens't look like a super realistic explosion, it needs to be heavier and faster. About the parts that fly away and bounce of on the water's surface is a nice idea but I doubt that such an amount of burning pieces will ever bounce that many times on the water itself Maybe adding some water splashes would give this a more realistic look too. But I know you put alot of effort in this and the result is the effect of your hard work so keep on going, tweaking the little and last bits are the annoying parts of live

Cheers

Frazzle