i know i’ve been on about this type of thing before, but bad astronomy put it well:
“oh, baby. the cloud is only a few dozen meters across, and can’t be more than a few seconds old.
i love stuff like this. i tend to think of Mars as a stiff, still, unchanging place, but then hirise goes and slaps me in the face with something like this. mind you, this is an avalanche. on another planet. caught as it happened.
and this is worth a watch: