The motorists' car had broken down on the highway and they were standing next to it on the road as the semi approached at full speed.
A highway patrolman can be seen trying to flag down the semi before scrambling out of the way.
Fortunately, the group was able to do the same a split-second before the semi swerved and past them on the shoulder lane.
No injuries were reported and the Utah highway patrol reminded drivers to look out for road hazards.