Haman's Gallows Beam from Noach's Ark
Haman chose a fifty-amah beam from Noach's ark, brought by his son Parshandasa, to hang Mordechai, yet in the end he and his sons were hanged on it.
Haman decided to hang Mordechai upon a high beam. Not just any beam would suffice. He decided to use the beam that his son Parshandasa brought back from his travels near Mt. Ararat. That beam which came from Noach’s ark was fifty amos tall. Even though Haman had already used it to construct his house, he was willing to damage his house to get to the beam.
Ultimately, Haman and his sons were hanged on that very beam.