This is an expensive and insanely hilarious prank, if it’s true.

Edit: Fake, most likely. Though the car part would be a reasonably cheap and easy prank if you wanted to prank someone who can take it. You can snag shitty ones for like $80-$90. So here’s a funny Nick Offerman segment about merging on the highway -

https://reddit.com/r/legaladvice/comments/5gkmlk/someone_expanded_8_foam_mattresses_in_my_car_and/