Cool Technologies Inc (WARM)

[drtc]

How were 2M shares traded after market?
1) Are otc shares tradable after market? I assume that clearly they are because it happened Friday 3/6 and it moved the mark almost 40% down
2) How was an individual able to move that many shares after market when there wasn't an ask lot of
that size especially since it seems that whole lot of 2M shares was moved at one particular ask.
3) Is this an example of one of the market makers acting in some nefarious but legal manner?

I appreciate any informed person replying to my perhaps naive questions. My position in warm is near total loss so this is more just for my information.