These are pretty much people concluding too much or being too overexcited about the increase. It is all about the increases because it is beneficial for them obviously, therefore due to continuous rush in increase they believe it is gonna go to the moon then finally give up in the end once their expectation didn't get the satisfaction. Ignore these traders or somehow you could lecture them to avoid getting too much of their emotion. Emotions aren't all about the regret or depressions, it could also pertain from positivity of one's view in a situation. Somehow it is getting to exaggerated and it is no longer controllable emotion.
I would want to stick with the over excitement part. The thing is that it is normal to see people get a little bit anxious after holding through the dips and once they see some upward movement in the market, they start anticipating for moon-ish behaviors in the market. Things do not work this way and it would take some time to see the market get up pretty fast.
Nevertheless, an uptrend can start from what could be perceived as a correction, but at least, it makes sense to allow it form first before even calling moon.