What is this Script

[ShyGuy64]

I have been working on a level for almost a day, I save it to notepad, then, when I try loading it back up, this shows up.

"A Script in this movie has made Adobe Flash Player run slowly.
If it continues to run, your computer may become unresponsive.
Do you want to abort the script?"

If I say Yes, It freezes the game, If I say no, the message keeps popping up.

[Forgotten]

That's normal in Super Mario 63, it happens whenever it loads a huge level. Just keep saying no and it'll load eventually.