How to connote panic in a film - an ongoing theme in zombie/infection films

[Setting the scene]
During a military evacuation of a city for unknown reasons, one man is frantically searching for his son, rushing past the thousands of frightened people who are moving fast towards the boarder.

Expressionism - and

Shot Types
Close-up - This shot shows the man's emotion more clearly, it is also intensified, causing the audience to sympathise with him.
Crane shot - This would be used to show the audience the effects of the evacuation and the man's giant task of finding his son amongst the thousands of people.
Shaky-cam - This technique would intensify the action and would replicate the man's struggle.
Pan - This technique would be used to replicate the man searching for his son -- looking from left to right -- combined with the shaky-cam.
Tracking shot - This technique would be used to employ the feeling that the audience is following this man's journey.
Eye line-match - This would put the audience in the protagonist's position; they see what he sees.
Reaction shot - This would explicitly show the man's fear and panic.

Fast transitions convey a sense of panic perfectly, they reflect the man's jumbled thoughts and his reaction to the situation.
There should be no sound bridges, as these are used to create smoother, less jarring transitions between shots. It is important to make the sequence as uncomfortable as possible. 

Expressionism - The man's frantic search for his son and his fear for the loss of his son.
It would be important to convey a sense of struggle fear and claustrophobia, this would be achieved by maintaining a shallow depth of field. The lack of focus on the individuals around the protagonist would create a loss of identity, which would lead to fear. Close-ups would reinforce his fear for the loss of his son.

The weather should be grey, dull and cloudy. This choice would reflect the man's emotions and what he's going through - Clouds in the way of the sky (people in the way of his son) Upon finding his son, it should start to rain, symbolising a cleansing of the man's brain. The rain also replicates the man's tears as he embraces his son.
Natural lighting maintains a sense of realism, there will be no artificial action.

- Ben -