According to the information that we were able to gather about this incident, the whole mess started after the truck driver, abruptly changed lanes and ended up pushing the pickup truck against the guardrail.
How and why did they get to the point of pulling guns out, we are not sure but it honestly appears to us that none of that was necessary.
By the time the video starts, there is a struggle between the two drivers and a gun in their hands, and the things are much more serious than they appear since we all know that many bystanders have died due to a stray bullet.
This time, luckily for all of the other drivers, the guy who pulls out the gun is the only one that gets hurt by it, as he shoots his own finger off in the squabble.
source : mirror