If what you're asking is what I think you're asking, you needed to get the next gun upgrade, or something. It has been a while.
What I love most about that trailer, by the way, is the awesome orchestral update of *the same theme music.*
I would kinda wish that it would be more traditional platform-from-the-side-angle; it looks a little like the original SPIDER MAN movie-game mechanics with the web-swing from some of those clips. But regardless, it WILL BE MINE.edit
Yeah, I looked up online, and I was right; there's a wall in Area 7 that you have to blast with the 3-way cannon, which means you have to equip it from the map screen before descending. I assume that's what you meant.
It is good to know this sort of information is trapped in my head, should it ever become useful.