Started with a simple physics experiment and ended up creating a black hole! The graph shows what happens when you get a bit too ambitious with your "dropping balls from heights" experiment. In Regime I, everything's normal—Galileo would be proud. By Regime II, Earth is like "hey, I'm accelerating too!" Then Regime III hits and suddenly you're warping spacetime. The note "you don't want to be on the red line" is basically saying "congrats, you've just created a catastrophic gravitational event that will destroy everything." Just another day of pushing physics to its limits! Next time maybe start with something smaller than 11.3 Earth masses for your lab assignment.