Act 1's Illegal Instruction error is well known and easy to get. However, I discovered it was possible to get it in Act 2. It is more difficult to get but I think the trick is to roll across the finishing point when the in game timer gets close to 3 minutes.
Pressing C attempts to continue running the game but usually is unsuccessful when you do the same thing I did in the video.
In a Sonic 1 Romhack, there were many ways to trigger illegal instructions and other errors and usually pressing C for long enough will resume gameplay, but it glitches for the next level or so before actually being back to normal. Let me know if you'd like to see a video on the romhack!

Merry Christmas to you all, and thanks so much for 100 subscribers! ❤

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