CMD:dance(playerid, params[])
{
    if(GetPlayerSpecialAction(playerid) == SPECIAL_ACTION_ENTER_VEHICLE)
        return SendClientMessage(playerid, -1, "You can't use this command while entering a vehicle.");
    else
    {
        switch(strval(params))
        {
            case 1: SetPlayerSpecialAction(playerid, SPECIAL_ACTION_DANCE1);
            case 2: SetPlayerSpecialAction(playerid, SPECIAL_ACTION_DANCE2);
            case 3: SetPlayerSpecialAction(playerid, SPECIAL_ACTION_DANCE3);
            case 4: SetPlayerSpecialAction(playerid, SPECIAL_ACTION_DANCE4);
            default: SendClientMessage(playerid,-1,"Invalid dance style.");
        }
    }
    return 1;
}

// Below could be vastly improved.
// Below might not even work, but it's worth a try.

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys & KEY_SECONDARY_ATTACK)
    {
        if(GetPlayerSpecialAction(playerid) != SPECIAL_ACTION_NONE && !IsPlayerInAnyVehicle(playerid))
        {
            SetPlayerSpecialAction(playerid, SPECIAL_ACTION_NONE);
        }
    }
    return 1;
}