Daedalus

In the movie Birdman, the character of Michael Keaton has been compared to X, who in Greek mythology is the son of the master craftsman Daedalus, the creator of the Labyrinth. X and his father attempt to escape from Crete by means of wings that his father constructed from feathers and wax. X's father warns him that he should fly neither too low nor too high, because the sea's dampness would clog his wings or the sun's heat would melt them.But X ignored his father's instructions not to fly too close to the sun, resulting in the wax in his wings getting melted and him felling into the sea. Who is X ?