I’ll go first. Mine is the instant knockout drug. Like Dexter’s intramuscular injection that causes someone to immediately lose consciousness. Or in the movie Split where there’s the aerosol spray in your face that makes you instantly unconscious. Or pretty much any time someone uses chloroform.
All they need to do to solve the problem is make sure to focus on the road. They don’t need to actually be driving, just act like they are driving by looking at the road more than their passenger.
Well that’s to solve the appearance, but I’m commenting with an actual physical car, on a closed road, being towed or not, etc. Don’t need the bother when you can green screen it.
Filmed in a real setting always looks less distracting than a green screen.