Revealing mistake: Just the bridge is blown up at the start, you can see all the soldiers have been replaced by dummies. (00:12:10)
Revealing mistake: When the plane goes through the smoke at the start, the smoke doesn't react in any way - it keeps rising. Surely the wind from the plane would make the smoke drift a different way. (00:12:25)
Answer: "We keep it light" refers to their mood. They joke around and tease each other and have fun. "Till we go dark" is when they get serious for killing. "We go pitch black." Meaning as dark and brutal killing machines as possible.
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