Is smooth slow motion physics possible with SpriteKit?

Question

Setting the speed property of SKPhysicsWorld to anything less than 1.0 slows the physics simulation, but does so in a way that results in staggered animations - like this...

Is there anyway to slow the simulation that would result in smooth animations?

Cheeky Bonus Question: If not, is this possible with any other 2D game engine?

Answer 1

The simple solution (provided that this behavior is normal and not caused by, for instance, updating the ball's position manually or via a move action) would be to design the game/physics so speed 1.0 represents the slowest game speed, while at "normal" speed the speed property might be, say, 4.0.