MacJedi wrote in about Saruman’s “bombs”: On page 12 picture nr. 4 of your frame by frame of the new trailer you can clearly see an Uruk chieftain running towards the Helm’s Deep Wall with a lit ‘Molotov from Hell’. The Molotov/Mortar has some smoke coming out… And if you watch the trailer in slow/mo then it becomes even more obvious…”
Carwyn also wrote in and said, “In the new trailer at 2:16, you can see a guy running towards the wall (he’s moving faster than the rest of the crowd), and he’s holding something that is creating a lot of light, sparks and smoke… the kind of sparking you’d get with a fuse for a bomb.”