Spartans wear their underwear on the inside

Spartans wear their underwear on the inside

Looking at the Jet Pack, the new armour ability for Halo Reach,  I'm wondering how 'in the real world' if it would actually work...  it looks like the physics are all wrong.. where's the stabilisers? Wouldn't the Spartan burn their legs? On take off wouldn't the body get pushed forward at an unuseable angle? How will the Jet Pack be able to carry a Spartan armed with a fully laden rocket launcher?

Oh sorry did I just go too fan boy for you?

Suck.It.Up.