As it seems hard, It's actually the easiest clip in the game! To do this you have to arrive to the first checkpoint and go to the jump right of where the button is ( Be careful as you might press the button ), let Sonic push the button and then jump on the button and immediately go on the moving platform and let Sonic face right and then you should clip inside the wall; Once you've done that press left on your controller/keyboard and you should clip right to the end of the stage. It can be done in Non-TASes ( Speedruns that can be performed by actual human people and they require a lot of skill ) and TASes ( Speedruns that cannot be performed by human people and they require a lot of time and skill ).
![](https://i.ytimg.com/vi/vTDvO4Ai0WQ/maxresdefault.jpg)