Double meteor sighted

A couple of nights ago, I was out looking for Perseids when I saw two
close, parallel streaks race from Andromeda to Cassiopeia. In less
than a second, both trails were no longer visible. Does anyone have
an idea of how common double meteors are? I've heard of them before,
but this was the first one I've witnessed.

By the way, sometime last year, I witnessed what looked like a meteor
storm of some kind near M51 (Whirlpool Galaxy, Ursa Major). Through
my telescope at low magnification, I could see several dim trails
forming every second(!), going in every direction from a single
radiant. The whole event lasted less than a minute, and I could not
see the meteors--if that's what they were--naked-eye or even in my
finder. Does anyone have any theories about what this could have
been?


- Robert Cook