A pool on the school gym floor

In the movie ‘It’s a Wonderful Life’, there is a description of a pool party that takes place in the school gym. As per the movie, the host hits a button, and the half of the gym floor opens up to a pool. Many of the audience must have taken this to a trick, but the fact is that this is 100% real. This swimming pool was installed in the year 1939, and it is still there at the Beverly Hills High School. This particular section of the school is known as ‘Swim Gym’ and it can be operated only by a particular person who has the keys of the floor.