Try that:
void OnStart()
{
       AddEntityCollideCallback("Player", "Yourarea", "yourarea", true, 1);
}
void yourarea(string &in asParent , string &in asChild , int alState)
{
       SetPlayerCrouching(true);
       FadeOut(2);
       PlaySoundAtEntity("", "react_breath.snt", "Player", 0, false);
       AddTimer("Timer", 2.0f, "wakeup");
       SetPlayerJumpDisabled(true);
       SetInventoryDisabled(true);
}
void wakeup(string &in asTimer)
{
       StartPlayerLookAt("ScriptArea_1", 2.0, 3.0f, "");
       FadeRadialBlurTo(0.07, 0.015f);
       FadeIn(2);
       AddTimer("Timer", 1.0f, "begin");
}
void begin(string &in asTimer)
{
       SetPlayerCrouching(false);
       SetPlayerJumpDisabled(false);
       SetInventoryDisabled(false);
       SetPlayerStateToNormal();
       FadeRadialBlurTo(0, 1);
}
I hope it works 

But i dont know how to make the player fall down 
