Happy ghast too slow? Give it the zoomies with a Snowball on a Stick!
These can be crafted with one fishing rod and one snowball, just like you would a Carrot- or Warped Fungus on a Stick. Simply [Use] (Default: RMB) the rod while sitting on a happy ghast, and it will fly a little bit faster for about 15 seconds!

This data pack has a required resource pack that you will also need to install.
You can find this by going to the versions tab, and clicking on the version of the data pack that you have downloaded or wish to download. There you will find a files section underneath the changelog with a download for the required resource pack.