I’d like a car with a system like what is shown below.
In class, when discussing income and substitution effects, I point out that drivers are typically more aggressive than their passengers would like. This is because they are holding onto the steering wheel: the costs to the driver of driving aggressively are lower than they are for the passenger. It’s also why passengers like to grab onto what is sometimes known as the “Oh Shit Bar” (the hand hold/hangar above the interior of car windows).
The video is no longer politically correct, but still, it’s a pretty cool system: