Course Fails

What was the Worst/Best/Weirdest/Funniest/Most Cursed fail you made on Mario Kart PC while working on a course? If possible, give as much detail as you can.

Trying to make 2 different routes for the track

Trying to make a Toadette Circuit with a section that opened up a secret route if you entered it. We were still trying to figure out the whole override thing, but I eventually got it working. But then after they updated it to allow the music to change, it kept restarting every time I crossed an overlap trigger while playtesting, so I just gave up. It's probably still sitting in my storage somewhere.