what are the weirdest mario kart tracks you can think of?

my first answer are all tracks where you drive on food

This track I made https://mkpc.malahieude.net/circuit.php?id=221224

only the title is quite strange try my track which bans mushrooms

Tracks that do not meet back to the start are very weird

How don't the characters get injured or die if they crash at max speed onto walls

because the cars have the invisible forcefield