Bulletstorm Walkthrough - Act 3 - Chapter 2: Part 3
Full Walkthrough: http://www.gamefront.com/bulletstorm-walkthrough/
Continue to follow Trishka and kill the next huge wave of Skulls in this area. With the area cleared, head into the underground bunker. Log into the Dropkit just ahead. Once outside, kill the group of Skulls as you make your way downstairs. Plenty of opportunities here to earn some "Vertigo" kills by kicking enemies over the edge of the stairs.
Once you get to the elevator, pull on the lever to have it take you up. Move out and kills the attacking Skulls as you cross the catwalk. Turn left at the end and use your leash on the generator to pull it down and create a path.
Cross the makeshift bridge and head downstairs. Kill the oncoming attackers as you head up to the other side. (Kicking an enemy into the huge gears will result in a "Grinder" kill.
Kill the next wave of Skulls as you head down the stairs to your right. (Kicking an enemy high into the air and shooting him in the rear will earn you a "Rear Entry" kill).
Take down the second generator using your leash and make your way across. After you head down the stairs, take down the Vulture using your leash. Take out the last couple Skulls across the way before the huge gear comes barreling through the platform.
Hold LT when prompted to. After you land your death-defying leap, use your leash to take down as many Vultures as possible.
Full Walkthrough: http://www.gamefront.com/bulletstorm-walkthrough/