Well, Ive seen these things around, and I am palnning on putting one at the end of my haunt as a final climax. I understand the basic idea of it. Its a falling elevator. I just have a few questions.

Where can I find the sounds needed for this effect?

What would I use to syncronise the effects (lights and movement) with the sound?

Right as it starts to "fall" I wish to drop a few weights (only a few inches) ontop of it to make that initial jolt. What would I use to release the weight? (something that can reset easily)

Thanks in advance...
Brian