To be honest, I didn't think things through and will most likely scrap the above idea, and here's why:
- This will definitely requite a lot of concentration on my end, so I honestly don't know if I'll be able to track each hit properly.
- I suck at creativity, so the challenges will probably be generic (though if I try to add anything complex, it'll probably ruin what place you'll end up in).
- Since mm usually "does Time Trials" during most of the races, the challenges wouldn't be fair on his end.
- The above idea (first spoilerbox) was something I typed out of boredom.
Of course, if you guys have any ideas on how to keep things interesting, I'll try to continue this.