It appears that you can buffer any input to the unpause, and it just happens that it makes SSJ's more consistent (it's not the crazy type, but it does send you further than a longjump). Here's a video explaining and showing more:

I can't get it to work I tried to get it work like 2 hours without getting it

okay well this thread is nearly 4 years old but did you actually read the description:

"As for versions, so far this is confirmed as working on NTSC Emulator (works 99% of the time), NTSC PS2 (some places and camera angles). I couldn't do it on PAL PS2 and XBOX (lower framerate means less game lag I guess, and XBOX has barely any lag),"