Harrison watches the London bombing, not the ship crash. No real spoilers here, since it can all be pieced together from trailers: the Dreadnought crashes into the harbor and momentum carries it well into the city. Harrison dusts himself off, hangs out the broken viewscreen and stares at the damage below. He then somehow gets out of the ship and runs like hell through various windows. Now for the spoiler part: Spoiler: and now for something completely different Spock vows vengeance after Kirk's death and the obligatory "KHAAAAAAAAANNNNNNN!" scream, and likely beams down to beat the living, genetically-enhanced shit out of him. The fight scene on the barges ensues. I haven't seen the movie, just surmised this from the trailers, but I hope there's a more climactic ending than this.