stop it! stop! reporter: watch this driver so angry he was cut off he follows the driver home. try to run me off the road. [ bleep ]. reporter: cameras rolling as things quickly escalate right there his wife hands him a gun. it accidentally goes off and everyone survives but violent acts of road rage are only getting worse. nearly 1500 people killed since 2008. hi, we have a really bad emergency on highway 80. reporter: it just happened to delaney when she says a driver cut her off. i flip her off and can you pay attention to the road. reporter: that s when the other driver lost it and delaney and her friends rolling. she s swerving us off the road and keeps trying to hit us off the road. she just hit our car. reporter: delaney calls the cop. she s saying she s a cop, knocking on a window saying she s a cop. go ahead and go.