Ludicrous-speed bouncing around.
Completed without collecting any emeralds, with both Sonic and Tails controlled by the player.
This run takes everything you know about Sonic and Knuckles and turns it upside-down. It extensively uses the "scroll objects offscreen to pass through them" trick to warp to places that shouldn't be reached, break bosses, and effectively skip entire stages.
Approximately 65 seconds of in-game time are saved in this run of Sonic 3. For details about what's changed, we recommend reading the author's comments of this movie.
The downloadable encodes in the second set use a camhack, which attempts to always keep Sonic onscreen and puts HD sprites on top of the background to make the TAS look even better.