They are known to release news at the bell, too. Sometimes MM's like to take a stock down before a PR. I've seen it happen quite a bit.
Oh chit it's going to .0001!!!
.0018x.002 about to break resistance!!!
We're heading for pennyland!!!
No, wait, nickelland, pick up some more!!!
It's going to a friggin DOLLAR, weeeeeeeeee!!!
BS bid whacking and it's a good buying opportunity!!!