I once saw a video (I thought it was part of a demo reel on wondertouch's site) of a emitter shooting balls at walls and the ceiling and sparks would then shoot out from the impact on hte wall and bounce on the floor. I'm trying to find it for a little inspiration/ideas for a project I'm working on. Does anyone know what I'm talking about or know where I can find the video.
The only thing I can think of is an old project called "welding sparks" or something like that. It didn't have any ball particles, but did shoot out sparks that bounced off the edges of the frame (had a deflector all the way around the edge).