Terminator Salvation (2009)

Continuity mistake: In the scene where Blair escapes with Marcus and Barnes launches an explosive into the tunnel, Marcus hops onto Blair to save her from the scorching flames. After the fire, Marcus' coat would have been burnt to a crisp, his hair singed off and the skin on his back fried. More evidence pointing to this was that his coat was merely one previously worn by a Resistance fighter, not special in any way, and he has regular skin and hair. (01:06:50)

John Connor: I knew it. I knew it was coming. But this is not the future my mother warned me about. And in this future, I don't know if we can win this war. This is John Connor.

Trivia: When Marcus Wright, Kyle Reese, and Star leave Los Angeles, they make their way up the hill up to Griffith Park. This is an homage to Terminator 1 because this observatory location is the same location that Arnold Schwarzenegger arrives at from the future, finding Bill Paxton and some other thugs and stealing one of their clothes.

Question: What causes the explosion near the start which causes John Connor's helicopter to crash? I may be missing something, but they never seem to address it.

Jon Sandys ★