Blu-Ray. It's all about control. If you cross the 7000 rpm limit, your car's engine may blow up. Hence, director Howard Hawks would like to show us how much his characters can bear before becoming violent or burst into tears. Now, you may like it or not the way he illustrates his idea. A movie reserved to 'Cahiers du Cinéma' readers or hardcore movie lovers.
Red Line, more than any other Hawks, made me think of Only Angels Have Wings, his greatest achievement. Space and characters (always with their Hawksian relationships) that will invade it, providing the unfolding of the plot that is always linked to death and the proximity to it. There are those who can handle it and those who allow themselves to disrupt.