The lobby became flooded, soaking one guest in attendance.
The pipe exploded after Open Heart director Kief Davidson's mother flushed a toilet, according to The Wrap.
Water gushed its way into a lobby area that was filled with nominees and studio executives.
"The poor woman came out looking like a scene from Carrie," The Tsunami and The Cherry Blossom nominee Lucy Walker told the publication. "She was drenched."
The unfortunate pipe burst happened just thirty minutes prior to the 85th Academy Awards, hosted by Seth MacFarlane.
Organizers of the event attempted to get the leak under control by using vacuums on the soaked carpets in the lobby.
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