Lightning effect

[genel]

While playing with lightning effects for a production of Young Frankenstein, I created a slide show with the image with the lightning flash as part of a slide. Synched with the thunder. Looks pretty good but is a lot of work. When I tried just flashing up a single lightning image on top of the lab when the flash was over I ended up with a blank screen. So I created a slide show where I have some lighning images interspersed with the plain "Lab" image.