Boosters (Rush)

 are interactive objects in Rush. They appear almost on every Track, along with Bolts. When touched, they speed the player up. The smallest number they appear in is 3, with something like 9 or more being their highest.

They will greatly speed up the player, lasting longer the more boosts they hit, but the speeding up will slow down, and eventually stop.

Trivia

 * Boosts appear in every Racing Game ever made, in many shapes and sizes also.