Throwing lightning is read as sudden insight and electric energy. Dream books link it to flashes of anger or brilliance that strike before they can be held back.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.