The original Super Mario Kart's Battle Mode was really fun, even though I got lambasted regularly when I'd battle people online with my XBand modem.
But I did spend enough time with it to discover some really odd quirks. For instance, get yourself a banana peel and maneuver yourself to this spot on Battle Course 1.
Then hold Up and press A to throw your banana forward. Normally when they land out of bounds they disappear, but not this time, oh no.
It's still there, and what's worse is that if you use a feather to leap out of bounds, say to avoid a red shell, and you land on that peel, it will count as being hit, costing you a balloon.