I'm going to spoil the opening sequence.. if you don't mind..
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seriously.. you shouldn't spoil it..
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trust me man, it's awesome.
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okay, here we go.
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last chance..
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So it starts off as you're laying on the ground. Things are blurry. You can see airplanes flying overhead. You hear the wind blowing through the tree over your head while leaves fall on you. A man stands over you. "Baker! Baker, are you alright?!" "He's alright, stand him up!" "Baker, wake up!".. as you slowly focus, you hear "INCOMING!!!!!!!!!!" and your guy JUMPS up and you're right smack in the middle of a trench. Grenades exploding, people shooting. You shoot for a while. I turned around and saw a guy dead on the ground. I bent down and was shot. As I fell, I see a teammate stand up on top and scream "YOU WANT ME?! YOU WANT ME!? TAKE ME!!!!!!!" and throws a grenade. At that time, an explosion happens, he flies back, and lands on the ground right next to you. You can see his bloody face and his glasses are crooked. Scene fades out and you're on an airplane. You're in command of these boys. They're sounding off when all of the sudden the plane gets shot. Baker (you) looks out the door. You see hundreds of planes and thousands of parachutes. You jump. Your chute opens.. and the first true level begins.
It's AMAZING.