In Rock Bottom, Mrs. Puff tasks SpongeBob with collecting 6 pieces of Artwork. This can be skipped through collecting a Purple Shiny Object which serves as a developer debug trigger and is located in the ground beneath Mrs. Puff.
In order to access this Shiny Object, SpongeBob must get a slow cruise boost before proceeding to bash off of Mrs. Puff. This stores an adequate amount of down momentum, which can then be used in conjunction with lag clipping to clip through the ground, collecting the Shiny Object. Additionally, if the player reacts to grabbing the shiny in a timely manner, they are able to re-enter the trigger for talking to Mrs. Puff. This teleports them back above ground, saving having to reload the level.