So like, Sonic & All Stars Racing Transformed has this Swarm item. What it does is put a giant swam of wasps in front of 1st place. If 1st place is skilled then they can maneuver through the wasps but it's not easy. Furthermore, the wasps last for a certain amount of time so the racers close to 1st will also have to deal with the wasps.
...I wish this game had a similar item; it's actually a fucking brilliant item because it's fair, promotes skillful driving, and can still screw over 1st by timing the usage of it to be when it's hard to avoid.
Oh, and I want that game now. I'll probably be getting it for the PS3 whenever I get the $$. Supposedly it's the best Mario Kart alternative in over a decade.