Hehe, I have never tried to have one. They just happen. Some days I don't get them, but I usually do. Today I had a lot of fun in several lucid dreams. Although I failed at stopped a nuclear blast shockwave. I am still working on that. Oh yeah, and that whole lightning thing I tried once... Well, I made electricity out of a wire in my hand. It was very powerful too and gave me a nasty shock when I touched it. And what was cool is that they turned into tnt and made a nice explosion in my front yard. Blowing shit up is fun. Even in the dream I thought about starting the house on fire but figured that would annoy me in my ld. hehe