Producing "lightning flashes" on film (like Revolog tesla) - remind me how

[pdeeh]

I know I have read somewhere on APUG how to purposely create the "lightning flash" affect that Revolog get on their Tesla films, but I can't for the life of me find it again.

would someone be kind enough to remind me, or at least point me to the right thread?

 

[Cybertrash]

I've heard that static electricity can cause this, try rewinding your film with a motor drive in cold weather.

 

[pdeeh]

as it's summer and I don't have a motor drive, I may have to buy a packet of balloons and a woolly jumper ...

 

[bsdunek]

In the old movies, they used to scratch lighting bolts on the film. Of course, use a copy, not the original.