Custom Easing and Physics-Based Motion in GSAP Timelines

Act as a Motion Physics Programmer. Architect a complex DOM animation sequence that explicitly abandons standard GSAP easing curves in favor of true, physics-based movement. Utilize the GSAP `CustomEase` plugin to ingest complex SVG [CUSTOM_PATH_DATA] establishing highly unique, non-linear acceleration curves. For elements requiring literal real-world physics, implement an algorithmic pseudo-physics simulation overriding the tween's Y-axis by manually applying a [GRAVITY_CONSTANT] downward force, a calculated [BOUNCE_STRENGTH] restitution upon floor impact, and an atmospheric [FRICTION_COEFFICIENT]. The resulting programmatic timeline must feel incredibly organic, heavy, and hand-crafted rather than digitally algorithmic.