This is because they are so used to waiting until the very last moment to use it & seldom have to queue.
As a result of this, even a 10 minute car journey will see them popping-in both before, after & probably also thinking about it somewhere in between.
Do not attempt to initiate stage fright, as it just makes it worse. A Freelancer will still have to go again within the hour.
Freelancer: Sure thing! Gotta have a quick slash first
They: But you've only just been? You so have a Freelance Bladder!