So with the new update in H1Z1 came a ton of bugs and now exploits as well. This exploit is pretty game breaking and if lucky enough can win you the game (depending on where the gas ends up)
What you need to find is a one of those long trucks as seen in the pic below & an ATV. These are common in random camps.
Step 1: Simply drive your ATV into the truck
Step 2: Jump on the ATV. Sometimes it is best to jump as the ATV is moving and others after it is fully inside.
Step 3: Jump again into the truck and from the inside just do not fall on to the ground in the cracks between the tires. (you will get perma stuck)
From this position you cannot be killed by anything but gas but you CAN shoot out and kill people. They cannot shoot in.
Depending on gas location and how popular the area your truck is in you can do some serious damage. We watched as my one friend killed a whole team of 5 by himself being accused of hacking. This might also be a fast track to getting banned if you get reported enough by the people you kill. So use at your own risk.