Sky-sled

Hoverscooters are a Transformer vehicle from the Generation 1 continuity family.

It actually plays the first few bars of 'Dixie' when he does that.

A hoverscooter is, well, a scooter that hovers. It has no wheels. A Transformer can fly them through the air. While standing on it.

Their capability for dangerous speed is favored by younger riders.

Fiction

Marvel Comics continuity

During Unicron's attack on Cybertron, Nightbeat, Siren, Jazz, and Hot Rod are seen riding hoverscooters into battle. Siren rear-ended Jazz. And Hot Rod, well look at the picture above to see him almost knock off Nightbeat's head! On the Edge of Extinction!

IDW Generation 1 continuity

A hoverscooter is seen in Ironfist's Kimia Weapons Facility lab. Last Stand of the Wreckers issue 4