(adsbygoogle = window.adsbygoogle || []).push({}); Reasoning:
Well this was by no means hard or anything, but I didn't know what to do with this and I CBA to make something advanced with it. I hope you can use this to make better cars and such for MW2/Cod4 or w/e you please. I just made this to test with some physics, and I didn't have a use for it. Enjoy.

What does it do?
This is simple, it creates a crate that goes along with the terrain (like a vehicle). It uses simple functions (built in by IW) and it's pretty easy to use. It Won't run over big walls such as a barrier, and it won't go too crazy over jagged terrain.

To Spawn:

    

self thread crateMove();

    

crateMove()

{

	crate = spawn("script_model", self.origin+(0,0,30));

	crate setModel( "com_plasticcase_enemy" );

	crate.angles = self.angles;

	self PlayerLinkTo( crate, "tag_origin", 0.5 );

	wait 4;

	crate crateStart();

}

crateStart() 

{

        for(;

        {

				//use this ifront to keep going forward.

				//ifront = BulletTrace( self.origin, anglesToForward(self.angles) * 5, 0, self)[ "position" ];

				o = self.origin;

				ifront = self.origin + (5,5,5000);

				floor = BulletTrace( ifront, ifront - (0,0,9000), 0, self)[ "position" ];

				if(distance(floor, o) > 100)

					break;

				angle = vectorToAngles( floor - o )[1];

				angle += 360;

				angle = int( angle ) % 360;

				angle -= 90;

				if(angle < 45 || angle > -45)

					self rotateTo(vectorToAngles( floor - o ),0.3);

				self moveTo(floor, 0.3);

				wait 0.3;

         }

}