They're running their game, not yours. Best to realize this and go with the flow. Imagine an invisible hand of God and operating on a planet where scientific laws do not apply; You cannot know what will happen next, and you cannot rely on anything happening again like in the past.
Today's volume is incredibly light, though. The big boys aren't invovled. More likely it's the amateur permabears who always get killed near the end of a pullback. The same people were selling around the 10th of March.