The defining feature of oobleck is that if you try to move through slowly it is just a goopy liquid, but when you try to move fast the oobleck becomes hard (the

The defining feature of oobleck is that if you try to move through slowly it is just a goopy liquid, but when you try to move fast the oobleck becomes hard (then because it is hard you get stuck as long as you keep pushing). I guess the bit you were missing is that the period when layers slide quickly over each other is (in my experience) very brief: typically the experience is your spoon almost immediately gets stuck and further pushing will break off chunks of oobleck, not push it aside.