Give an example of a parabola in real life (Bouncing ball) . Do not just make this up off the top of your head. The St Louis Arch, for example, is...

Give an example of a parabola in real life (Bouncing ball) . Do not just make this up off the top of your head. The St Louis Arch, for example, is NOT a parabola—it is an inverted catenary. Please cite a source confirming that your example is, indeed, parabolic and not some other more exotic curve.