I looked in the documentation and the load function is only for opening URLs. You have to use the code member to set your code which you want to have executed:
var konami = new Konami();
konami.code = function() {
$("#myModal").modal('show');
}
konami.load();
You can also use a smaller alternative:
var konami = new Konami(function() { $("#myModal").modal('show'); });