This was another great Sturges film. It basically turns on the premise that revenge is easily imagined, but - as they say - "execution is everything". Unfortunately, or rather luckily, the vaunted conductor of a symphony orchestra does not necessarily bring the right skills to the table to perform a laborious and murderous revenge that he figures out in a fit of jealousy.
The first part of the film I felt was rather slow, but the buildup took me in. And once I got to the point where the audience expects something certain to happen, it got simply amazing. So in a sense a lot of the humor is derived from the audience's expectation. But it wasn't just a one-off joke. The whole thing was carefully enough constructed to combine the man's fantasies and the real-life into something great.
Worth watching again, if not for structure then just for the sheer fun of it.