I call it an opportunity to buy at a great price. Just added again to my position this mid afternoon. Both internal and external forces at work. On one end, you have the sellers and buyers while on the other side you have the talkers and the hoarders!
It is a legitimate trade, but it is an INSTITUTION buying from the market maker. This kind of trade is not available to retail. If you had an order in to sell under that exchange price, it would be IGNORED. Extended hour rules are different than regular session ... the market maker can totally ignore trades which would eat into his profit. Not "fair" but it is what it is.