AND HEY, not to change the subject or anything (you could think of this as a sub-post, etc.), I finally know how to get past that INST bug and that bug where some particles wont erase when you "flood erase" particles. Okay so step one, find where the bug is happening, you'll notice that this comes in contact with the "wall grid" (you know those grey squares PT used to have), well to get rid of that, all you have to do is click the "Erase Wall" option and erase that area (keeping close to it especially if you have any walls nearby). To check and see if there any other mysterious "invisible walls" just go to save preview and look around to see if there are any stray walls that don't appear during the "editing" part of the game play. Explanation: When you put up a sign, what happens is that it creates a straight line of "invisible wall" from where it is, to the "Okay" button. After that, that "invisible wall" blocks elements and SPRK, but doesn't show up during game play. The only time it does show up is when you go to preview it before saving.

And there ya have it. The (only) sure way to get rid of that bug (so far until they fix it). Sorry for making it so lengthy! D:

Yes, what happens is is that nitroglycerin is mixed with a stabilising material (such as sand or sawdust.)