Migrant workers in the Gulf states and elsewhere use this trust-based system to send billions of dollars back home, winning on both efficiency and cost.
And yet it is a miracle that Voyager 2 managed to send anything back at all, for its main radio system failed soon after launch, and its back-up system proved to be faulty.
The system will send audible and visual alerts at first in an attempt to get your attention back, and can eventually "apply the brakes on its own" if the previous warnings prove futile.