Complex sentence: Paul reaches a highway, but realizing he is off course and has low fuel, tries to flag down a truck in the distance, but seeing Mick in the driver's seat, having killed the original driver.
Split into simpler sentences: Paul reaches a highway, but realizing he is offcourse and has low fuel. He tries to flag down a truck in the distance, but seeing Mick in the driver's seat, having killed the original driver.