I dont think you can have a bad lucid dream because you are in control of it, only bad thing that happends to me is that I wake up because i'm so excited i'm dreaming lucid. Alltough for me lucidity isn't always an exit in bad dreams. Once dreamed i was in the second world war. I was in a pond hiding for germans that wanted to kill me. Suddenly i realised i was breathing under water... I knew was dreaming and i tought, hey it's just a dream, i fly away out of the pool. From under the water i could see the silhoutte of germans with guns that where standing around the pool. Then i tought, hmm... well you know what, i won't fly away because if i'm not dreaming and i fly away they will shoot me.
The lucidity of my mind has been revealed in new dreams
I am able to travel where my heart goes
In search of self-realization