So I was on Sunshine Airport, and at one point I was second behind Baby Daisy. Well, at some point during the long anti-gravity turn with all the spinners in the middle, I saw her going right across the track, left to right, before falling to her doom. Where'd she come from? No idea. How did she end up all the way there? No idea either, but she did. Now I'd heard stories about how they didn't bother adjusting the AI (which kinda makes sense because humans are pretty inert at the whole 200cc schtick as well), but I found this way funnier than it had any right to be.
And when I say they didn't adjust the AI, I mean it. Go on any track where you can keep the gas on the floor the whole time (like Water Park, Toad's Turnpike or N64 Rainbow Road). If you don't get bombarded with items, just watch the gap you'll open up. It's crazy. It's like you're on 200cc, but they're still stuck at 150.