Shorts are just shares borrowed. This is usually just brokers...

Shorts are just shares borrowed.
This is usually just brokers like USB and Co
Controlling the SP.

They dip the SP down while buying their own shares on the way down.

Once down it is a matter of covering their shorts and positioning them selves for the run up.
If a black Swan event occurs they push the SP up way over what it is worth.
Sell their longs and cover while pushing the SP back down.

Maybe not the best explanation but I know what I mean.

Buying opportunity now I think.

Cheers