This actually sounds pretty cool... When people are new to lucid dreaming they usually find that altering things like time is difficult because in the beginning it is harder to let go of the physics of waking life.. however, I think the idea of using a device of some sort would be a really good way of getting your mind to let go of these preconceived notions.. in fact, the first thing i think of would be using the dvd remote for this, since it has a pause and a slow motion button.. as well as fast forward, rewind... these could be fun as well.. before you press the button on the remote, remind yourself that the normal laws don't apply to this world and that this remote WILL control time.. i think this will work..