Iridium Flare lights up clouds?

Jim (
Sun, 05 Apr 1998 09:28:29 -0500

I watched one of the Iridiums flare up to -4 or better last week and saw
what looked like a cloud being illuminated.
It was a near cloudless night, but at the flare hit max there was a
bright cloud around the flare.
I didnt figure it out right away, but after I came inside it dawned on
me. My wife was with me and she seems to have seen the same thing.

We live on the edge of the Ozark National Forest and have very dark sky
conditions so this may not work on places with some light pollution. 
                                                          Jim Hale