Me, I just like observing the torque rise twisting the front bumper sideways (the frame is flexing with the torque rise of the engine).....l
1500 ft.lbs is nothing for even an emission compliant diesel (class 8). The ISXC's can be set to 2300 ft.lb. in multi-torque mode.
I drive a Western Star day cab like the one in the second vid. It's 6 years old with a 550 Cat, 3406, 18 speed Road Ranger, 18 series driveline, 44 rears with a 370 final drive. A bit of smoke (where there ain't no smoke, there ain't no power). It's an everyday working truck usually pulling an 8 axle flatbed in michigan and grossing around 161,000 pounds.... sometimes quite a bit more....