Simon Pegg: Benji Dunn
[from trailer, Ethan runs into office building]
Ethan Hunt : Which way, Benji?
Benji Dunn : [over earpiece, looking at tablet] Turn left!
[Ethan grabs swivel chair and smashes window overlooking London]
Benji Dunn : Go, go, go, go! What are you waiting for?
Ethan Hunt : [hesitates on window ledge] I'm JUMPING out a WINDOW!
[office workers look confused]
Benji Dunn : Oh, sorry. Good luck!
Benji Dunn : We have to evacuate these people!
Ilsa Faust : There's no time!
Ethan Hunt : This whole valley's gonna be incinerated in 15 minutes!
Ilsa Faust : [the two helicopters take off] It's too late!
Ethan Hunt : No. I'm gonna get the detonator.
Ilsa Faust : What? How?
Ethan Hunt : I'll figure it out. Find Lane and find the other bomb!
[gets out of the jeep and jumps onto the first helicopter]
Ilsa Faust : What the hell is he doing?
Benji Dunn : I find it best not to look!
Benji Dunn : [as Ethan is running up a circular staircase being chased by the Apostles] Why is he running in circles?
Benji Dunn : [after Ethan hijacks a helicopter to chase Walker] Ethan, where are you?
Ethan Hunt : I'm in a helicopter going after Walker.
Benji Dunn : Hold on! How did you get in the helicopter?
Ilsa Faust : What? You can fly a helicopter?
Luther Stickell : Did you say "helicopter"? What the hell are you doing in a helicopter?