Rifts lore
Back in February of 1991, the Military Police company, in which I served, landed at Dharan Airbase, where we spent the next three days sleeping in our vehicles or in cots under ponchos spread between them. We get our first station, and head out to the desert to patrol an 80 mile stretch of highway. Before leaving, we hear rumors that there is a red convertible driving around with a passenger who takes shots at American troop convoys with a submachinegun.
Anyway, I'm in the HMMWV with the platoon leader, a lieutenant, and the Platoon Sergeant. I was supposed to be the driver, but the LT decided he wanted to drive, and the Sergeant, an Air Force Vietnam POW veteran, took the commander seat. This left me to man the turret mounted M-60 if we come under attack, though I had not qualified with the weapon. Ever.
About halfway there, one of the trailers hauled by a HMMVW flips (the hitches were designed to move freely for rough terrain). The convoy comes to a stop, everyone is getting out of their truck and running to see if they can get the trailer upright. I pop up into the turret, slap a belt of ammo into the 60, then look around. I look down at the Platoon Sergeant, and ask (being fresh out of Basic and AIT), "Shouldn't we get a perimeter set up, Sergeant?" He looks at me a moment, then starts barking orders. One other guy gets up in a 60,everyone else is grabbing their M16s and taking up positions. I happen to see a red, convertible sports car going by and track it with my 60 (though I had not taken out the pin so I could lower it and aim at the car).
Needless to say, the trailer gets righted and we get on our way to the log base where we would be headquartered. The hilarious thing about this is out of the thirty people who set up the perimeter, only two of us took to the 60s. Which were the only weapons for which we actually had any ammo yet. The ammo for our rifles and M1911s wasn't going to get to us until we got to the log base.
The point is, there is a reason I know to set up a security perimeter when the convoy stops.