Is it just me or do you, like I, sometimes refer to the main character in Halo as "Master Chef"?

It's just you.

*throws Plasma Grenade at Happypants, then laughs as he runs around screaming with the grenade stuck on his back*

wishes it was shanghai warrior so that I could set my rocket launcher on nuke and get even for the stickybomb.

BTW, I just finished the 4th level. When do I get some fun guns?

The green plasma gun is plenty 'o fun!! I love charging that sucker up and blasting those shield bearing Covenant freaks into the sky!!

The snow level.

Let me be more specific.....

It's called the Scorpion.

oh baby, that bad boy is awesome, i love sending covenants flying and shooting those birds out of the sky

For some reason I wish I could taunt. It may be cause I was playing a lot of Wing Commander Prophecy though, and I taunt like mad in that game : )

Is scorpion the rocket launcher?

The only flying machines I was able to control during the game were the Ghost and the one man flying machine, think it is called Patriot or Banshee or something like that.

the scorpion is a tank

What level is the scorpion on? I finshed the game and didn't see any tanks.

the snow level (5 I think)

Damn!
There's a huge section in the snow level where you drive this tank, for what felt like 20 miles. You probably saw it but thought it was just a damaged vehicle you couldn't interact with.

Is it the ship which shoots out a large blue sphere that will pretty much take you out with two shots? This ship "hovers" along the ground like a Ghost, but is bigger and slower moving.

No. The Scorpion is a human vehicle. To give you an idea of what it looks like, start the 1st level (Pillar of Autumn) again. Pay attention to the scene that plays out in the beginning. There's a section that shows the Marines scurrying about in the hangar of the Autumn. You'll see some of the Marines driving around in the Warthog and you'll also see them running around these two tank looking vehicles. Those tanks are Scorpions.