I have seen it regularly in my relatively short career on hercs. I even filmed it through NVGs two nights ago. Looks awesome. Unfortunately, as I am in the sandpit, it will be very very difficult to get to you :-( If your TV prog is being aired after the end of march I can get a clip to you if required.
First time it happened we had two inches deep of "fire" across the windscreen, props and wings, with a greeney-purple tinge, as we flew between two ENOURMOUS cells round Nice/Monaco region. It discharged as a lightning bolt along the longitudinal axis of the aircraft. Very eerie, and the distortion on the radio adds to the tenseness of the situation! Oh, we temporarily lost the wx radar, which was nice!