The zip out of the wall. I have not done much testing, but it seems that Left must be released on the first frame that Sonic is ejected from the wall, otherwise he loses all of his speed when landing at the loop. There is also a higher position that Sonic can zip along where he will always lose his speed when landing. This applies to the 32 p/f zip, the slower 16 p/f zip allows Sonic to retain speed when landing. The window to start the zip is 3 frames for the lower position, and the next 5 frames for the higher position.
![[TAS] Sonic The Hedgehog - Speedrun 100%](http://i.ytimg.com/vi/ew7d8YFDiTo/mqdefault.jpg)
GG's! 👍
What is the most difficult part of this?
The zip out of the wall. I have not done much testing, but it seems that Left must be released on the first frame that Sonic is ejected from the wall, otherwise he loses all of his speed when landing at the loop. There is also a higher position that Sonic can zip along where he will always lose his speed when landing. This applies to the 32 p/f zip, the slower 16 p/f zip allows Sonic to retain speed when landing. The window to start the zip is 3 frames for the lower position, and the next 5 frames for the higher position.