I did the same thing by rolling a hand truck over bumps in my driveway. I would hold at an almost vertical angle and roll it over an obstacle, then hold the hand truck closer to parallel with the ground and roll over the same obstacle. It is amazing how much more resistance is created the steeper/closer to vertical the angle becomes. It really is a simple and practical way to demonstrate the importance of proper control arm angles.

I def suggest trying this experiment just to get a feel for what the jeep goes through when you lift it and change your CA angles