As various missiles such as catapult loads and arrows fly through the air, we see their targets from the missile's viewpoint, a type of shot that director Sam Raimi uses quite a bit.
That beat-up Olds that goes through time with Ash belongs to director Sam Raimi. He included it in most of his early movies, each time more banged up than the last. The items in the trunk of the Olds are not product placements; they're what Sam Raimi actually had in his trunk.
An issue of the magazine "Fangoria" can be seen in the car's trunk.
Credits Fun:
In the opening credits, Bruce Campbell vs. Army of Darkness instead of "in".
DVD Easter Eggs: (Hidden So You Don't See Anything You Don't Want To See)
To turn the story boards on while the movie is playing, turn the directors commentary on in the options menu and while the movie is playing turn subtitles on and the storyboards will appear in the bottom right corner.