Lello,
I will have a look to see if anyone has posted a pic of an open disposable camera on the net.
THE MOST IMPORTANT THING if you dismantle one to get at the flash is to earth out the capacitor. Even a disposable with its tiny flash could give you a serious belt.
Whatever you try with the bulb consistancy is the thing. So if it is a drop, then you need to arrange some sort of height marker to ensure that. On my Oops shot the final frame was dropped from a bit higher than the others which I am sure contributed to the extra bounce. If you look at my bulb shot and then imagine the hammer at half way through the bulb then you would probably be talking a few milliseconds.
I am also looking at a new shot but I think I am going to have to make up a trigger specially for it.
Don