Destructionless Explosions?

[DiamondToaster]

The problem is that I want the explosion because they cause a large amount of player knockback. The player is able to throw snowballs and use them as "rockets" to hurt others or to propel himself in the air. I just can't find a way to make an explosion that still hurts the player and sends him flying, but Don't damage the terrain. I tried to use the OnExploding hook to restore that segment of the terrain but it turned out to be unreliable.