When a market maker gets an order to sell, let's say, 2 million shares, he works the order during market hours and then "prints" the trade immediately after the markets close. It is perfectly normal and not at all nefarious. It's basically called the "double print" which happens with OTC stocks only.
In IHubs trade link for WARM they are marked as 'avg', and not T. I believe this means they were traded earlier in the day when the price was around 0.008 (some of them would of sold for little more, some alittle less, thus an average of 0.008). You can see this occurred several times through the day Friday. I have never seen these averages negatively affect the opening price the next trading day and they are sometimes higher if the stock drops over the day.