Wages of Fear
(1953)

In South America, an American Oil Company dominates an isolated town. 

An oil well fire erupts that can only be put out by nitroglycerin driven over bad roads. 

The American union refuses to do it so 4 outcasts using two trucks are recruited for $2,000 each to do the job.  After some close calls, one truck blows up.  The other truck faces a pool of oil from a severed pipeline so Jo gets out to direct Mario.  Jo gets stuck under a branch and Mario is then faced with a choice: stop and get stuck or driving over Jo.  He drives over Jo who is mortally wounded. 

Mario delivers the nitro and collects all the money. 

Exuberant about finally being "free" he gets a little reckless while driving back and crashes, causing his death.  

Thanks Don P!