This Seeking Tech guide will explain how you can temporarily ride the cars in the Slo-Mo Casino level of Astro Bot.
Use the following video as a reference:
For the first step, play through the beginning of the stage until you get the power-up.
You should then wait by the crosswalk until you see a car you want to jump on to.
Afterwards, use the power-up and then jump on the car to ride on it until the timer runs out.