There is a local script in StarterCharacter or StarterPack(i dont remember) in his example place, if you click somewhere there is an explosion on it, check inside the local script
The only scripts in his example place are in Workspace and they don’t mention explosions
If your problem is that the explosions are not showing up, try doing it on the Client. They weren’t showing up at all for me, until recently I tried doing that.
Also, don’t make the script overly complicated at first, start off with LightningExplosion.new(position), and build up from there.