The demise of Hip, the robotic baby hedgehog: Hip was a surveillance robot built by Robotnik to trick the SU into finding Sanctuary, a freedom fighter orphanage. Manic had grown fond of Hip, thinking it was a real baby. When a fight led to Hip falling from high in mid-air, Manic tried desperately to save the robot, only to fail as it smashed into the ground, revealing the truth. You honestly can't say for sure what was harder for Manic to process: the Robotic Reveal or that he watched helplessly as a baby he cherished died right in front of him. Even worse, there was an indication that Hip had become sentient, as it dreamed of playing drums with Manic.