[DiscoBBQ]

 ShakeID = GetUserMessageId("Shake");
 
//Shake:
public Shake(Client, Float:Length, Float:Severity)
{
 //Clients:
 new Send_Client[2];
 Send_Client[0] = Client;
 //Write:
 new Handle:View_Message;
 View_Message = StartMessageEx(ShakeID, Send_Client, 1);
 BfWriteByte(View_Message, 0);
 BfWriteFloat(View_Message, Severity);
 BfWriteFloat(View_Message, 10.0);
 BfWriteFloat(View_Message, Length);
 //Send:
 EndMessage();
}