Hijacked

From Ben10versepedia

At a gas station, Max and Gwen go to get gas and Max says don't mess with the RV to Ben. Two hijackers steal the RV and taunt Ben. He then changes into Fourarms to attack but gets sprayed with a Fire Extinguisher and turns on the thrusters of The Rust Bucket, which get them back to the Gas Station. The entire inside of the RV gets messed up and in the end Ben gets in trouble.