A lightning/thunder system that "strikes" at a random time, with 11 different thunder sounds, randomly picked, the light flash and the lightning bolt included.

To put this in your map, just select any entity, other then the info_player_start or the tree props and copy and paste (all of the lightning entities are grouped)

Made by Sgt. Redneck.

Feel free to use this in your map(s).
If you want throw my name in the credits, thank you, but it is not necessary, only appreciated.