1.   He shot two new scenes with Smith and Klein and added a pre-title sequence where a flying rotary blade chases a terrified scientist through tall grass.

2.   It was merely two helicopters brought in to dry off the field with the whir of their rotary blades.

3.   It was merely two helicopters called in to dry off the field with the whir of their rotary blades.

4.   They have covered motor shafts and rotary blades with tar-based paint to lessen the corrosive affects of the humid salty air.

5.   To make the sections, the scientists moved the platform horizontally through a rotary blade, which was also horizontal.

6.   The helicopters, simulating sea and jungle rescues, were hovering beside each other when their rotary blades twined.

7.   One craft crashed when a rotary blade struck a tree and electricity cables, but it managed to land safely.

8.   One craft crashed when a rotary blade was shorn off by a tree and electricity cables, but it managed to land safely.