Much like Dark Skip, if the player jumps to the upper part of the end of the dark autoscroller early, it's possible to reverse momentum jump up to the area where the box is stored. From there, the player jumps over to the other side and waits until the map rotation is finished before attempting to squash the egg - otherwise, the egg isn't collected. This saves waiting for the box to get the Sparks egg.
Saves about 10 seconds.