whats the hardest cup youve tried?

mine would be a cup that i actually MADE. So its called "Sonic Cup" and by the title you already know what its about. So the courses are Pretty Hard but the last one... oh is it Hard alright... the last one has tight Corners and lots of pits witch is an extremely difficult combination.

oh and btw you can try it here: https://mkpc.malahieude.net/circuit.php?cid=17423

For me, it's from ElectroDarker and it's really really hard. I leave you search. But worse : in Mini Mushroom Cup