If you are using the standard asset pack explosion particle system for this course, there is code attached to the particle system that adds a knockback force to the player if they are close enough. I was confused as to why I was being flung into the air if I shot the ground under the player, so hopefully this helps anyone else who ran into this. You can remove the “Explosion Physics Force” script, or do what I did and just set the explosion force value to 0 (just in case you make a weapon/hit effect down the road that you want to have knockback). One final tip is to remember to reset the transform values for the effect as well as its components (such as the fireball) to make sure it visually instantiates exactly on where the raycast hits.