The Wilhelm scream sound effect

The Wilhelm scream was first recorded in 1951 for the movie Distant Drums. it has been in over 150 movies since. it was found as a studio reel labelled as "man being eaten by alligator". The scream was also emitted in 1953 in a movie called "The Charge at Feather River".

editing

without editing everything would be boring and repetitive. We are so used to editing that we don't notice it. editing can be used to condense long, boring activities into quick bursts of visual information. the simplest edit is the cut. they would cut the film getting rid of all of the useless stuff and putting all the pieces they need together.
                                                                                                











in the assassination scene in north by north west by roger thorn hill walking out of the car to the united nations building there are 24 cuts they are more frequent in the conversation  so we can see their reaction.

the pace of the editing can be used to create excitement and intension for example the shower scene in psycho and when Marian dies the pace slows down









dissolve
one scene dissolves into another, overlapping for a moment

fade out/fade in
one scene fades out completely, then another fades in

wipes
one scene wipes across the screen, revealing or replacing the next one

iris
the next scene replaces the last by appearing from the centre like the iris of an eye

jump cuts
two scenes that feature a common element right after one another, so something stays the same but the rest changes. this is used for disorienting or comedy effect.