I was using the fan when I got the idea that there can be another wall called cannon. You put particles in, you use the drag tool to aim and adust the power, andthe particles get blasted outat the chosen speed and direction. Tha'd be cool.
Good Idea it can hold particles like e hole and when you aim it will throw anything you want ,or maybe the powered version (you aim it and then when you spark it, it throws what it has in itself)
I had sort of figured something less complicated; just a wall that released a short burst of pressure using the line tool to dictate direction and strength.
I could make it into a game, where it loads the canon using PCLN(STNE) and then the player tries to fire at some targets.