Buses
From Mario Kart Racing Wiki
Buses are hazards in Mario Kart: Double Dash!! and in Mario Kart Wii. In Double Dash!!, they appear in Mushroom Bridge and Mushroom City as a hazard. If a driver hits the bus, the racers will slip. If a Bob-omb is thrown at a bus, it will fly into the air and then land and continue. In the Wii version, the racers will flip or get squashed if touched. This means it is also a hazard in MKW.
