There's the Sonic Physics Guide (http://info.sonicretro.org/Sonic_Physics_Guide http://info.sonicretro.org/Sonic_Physics_Guide), though that's more about implem

There's the Sonic Physics Guide (http://info.sonicretro.org/Sonic_Physics_Guide http://info.sonicretro.org/Sonic_Physics_Guide), though that's more about implementing the physics of the original Sonic games in code, rather than explaining real-world physics through playing Sonic games.