Maki Nishikino said:
yeah, one time in 20+ races. It's a rare occurrence and there is still plenty that can go wrong even if you manage to get them, like item spam from behind making you lose reds/make you lose placing so you can't hit first place with them. Just because there is one uncommon item that can actually manage to put a stop to that gap between first and everybody else doesn't make it any less *bleep*.
Still, even 1st place isn't safe from item spam, so even if you do manage to take 1st place to start out, it only takes something like a Spiny Shell or any shell color to mess up everything. Even the Lightning item can be brutal to 1st place.
Item luck tends to determine who wins and who loses, regardless of your vehicle combination, meaning that even the best player in the group could suffer dead last finishes if he/she is unlucky enough to get item spammed to death.
If you're in 1st place, and have not been item spammed on for the whole race, then you're just very lucky.