Please use my existing materials to help me design an experiment to prove that Xiao Zhong's point of view is wrong!

Experimental steps: throw the solid ball obliquely at point A, and observe it with human eyes. It is found that the trajectory of the solid ball is approximately parabola (or curve). Ignoring the resistance, the force analysis shows that the solid ball is only acted by gravity, and the direction is vertical and downward, which does not coincide with the direction of motion.