There are many other types of electric vehicles. A trolley bus (also called a trackless trolley) uses overhead electric lines to power it. Many trains use a railway electrification system to supply power. A few high-speed rail lines use powered magnets in the track to move the train, in a system called 'mag-lev' (magnetic levitation). There are electric bicycles and motorcycles and some tricycles (trikes) like the Corbin Motors Sparrow, which was also seen in the Austin Powers movie Goldmember.