Zombie nautilus and nautilus fly into the sky

First, tame a nautilus or a zombie nautilus, then use commands to apply a speed 255 effect to them. Press the W key to move forward at an angle toward the sky, and you will find that even if the nautilus or zombie nautilus leaves the water, it can continue to fly upward without being affected by gravity.

At the maximum speed level of 255, some creatures do continue to move forward or upward due to inertia. However, since the speed effect does not apply to airborne objects, under normal circumstances these creatures eventually stop due to inertia. Nevertheless, a nautilus with such a high speed can keep flying into the sky, unaffected by gravity. Yet, no matter how fast, airborne creatures will ultimately be influenced by gravity.