@Chainz.2da: Yes, the effect is immediate.
@Piece of Metal: I put a 0.2 sec delay between the arcs and each has its own sound, so you should be able to see the bounce. Lightning is kind of a 'messy' beam effect, so it's not as distinct as say the ending of Raiders of the Lost Arc.
Thanks for the feedback! Let me know if you think it's under- or overpowered. I spent as much time trying to balance it as I did coding it.