DO NOT BE TEMPTED TO PUT YOUR CAMERA ON A CARBON FIBRE POLE!!!
GEAR: Tripod, 14mm Samyang $450 lens, Sony A7R2 body, remote wireless trigger to avoid bumping.
No1 1s f/22 ISO6400 captures the lightning. You can't predict the lightning, so just keep on pressing the trigger repetitively.
No2, in RAW set highlights -100 to reveal the lightning bolt, Contrast +100
No3, apply Nik Color Efex to add some drama via contrast
No4, find another frame with nice lighting inside the cloud, Mask the unwanted areas, set to screen mode with 75% opacity.
No5, promote all to a new merged layer
No6, apply Nik Silver Efex contrast filter, set this layer to Luminosity mode ~57% opacity
No7, find another nice lightning bolt, filter it as below, mask softly to exclude the background, showing the new lightning bolt, use Pin light to bring it out.