Ha! That is amazing. I would love to read a book or blog just full of examples like these.
Another couple I can think of: (more common examples)-
* reducing baggage waiting time by increasing the walking time to the baggage carousels.
* Reducing "the phone rings too many times before customer support answers" complaints by lengthening the time per ring.
* Using mirrors next to elevators so people distract themselves and feel less bothered by the wait.