(meteorobs) Strange Lightcurves

[mark_vornhusen]

Hi,
I noticed that some meteors become nearly invisible for a moment and 
then reappear again. Here are two examples, taken with an xx1332 image 
intensifierer and 120mm lens (crops from original 720x576 pixel video, 
1/25s per frame):
http://www.parhelia.de/storm/2007/meteor_20070910_013826.gif
http://www.parhelia.de/storm/2007/meteor_20070912_022427.gif

I'm looking for an explanation of this phenomenon. Any ideas?

Mark