When Alex pushes Sean out of the window, they hover for a moment, then drop onto the bonnet/hood of the Sheriff's car. They steal the car &, a few minutes later, pull up in a car park & the bonnet/hood is undamaged.
At about 8:25, the main character tells his friend to help push start the car because the starter isn't working. The car appears to be an automatic and cannot be push started in this manner, like a standard or manual transmission. However, it seems Sean is just getting back at Nathan for his 'being a single mom' joke, as Nathan jumps in and says 'Starter my ass'.
At 33 minutes, Cal gets into his truck and puts it into Drive with no key in the ignition and the ignition switch in the "Off" position.