Create a "Cave In" effect?

[GoreGrinder99]

I'm looking to create a cave in effect but to no luck.

This here are the scripts pertaining to the cave in:

void OnStart()
{
AddEntityCollideCallback("Player", "CaveIn", "CaveIn", true, 1);

SetEntityActive("CaveInFloor", false);
}

void CaveIn(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("special_tunnel_1", false);
SetEntityActive("CaveInFloor", true);
SetEntityActive("block_box_11", false);
AddPropForce("cave_in_1", 1000, 0, 0, "world");
}

After coming to the end of the tunnel I want to have a camera shake and after a small delay for the player to decide if they want to turn back or continue, the cave_in.ent file will collapse into the tunnel, and onto the floor I created since the player won't be able to return to the tunnel afterwards.

Oh, but then again it would be a matter if allowing the player to backtrack out after deactivating the tunnel.

I figured a block box was in my way so I tried to deactivate it as well but after colliding with the area neither the "CaveInFloor", "block_box_11", or the "special_tunnel_1" were de/activated. Any suggestions?