No not weird. The view slows down eventually. I can't give the code unfortunately, as much as I want to, let me explain it: The view starts to rotate with the option of ease:Circ.easeInOut. Assume the view should slow down starting from time t. But between t and t+0.5, where unit of t is seconds, it accelerates shortly, then it continues to slow down and stops. My question is, at the moment of t, there must be a value for decreasing of velocity of the view for Circ option. Is this value calculated as radian or degree?