If anything comes unplug just start kicking it until something happens.
If he falls he just has to grab onto the umbrella which will provide a gentle float down to the ground.
At least his body lying unconscious on the floor will be easily spotted. ~Not-So-Handy Andy
Buses don't have seat belts. I don't see the problem.
And after 40 minutes your home doubles as a coffin.
I'm afraid if I saw this IRL my brain would go into video game mode and I would just go for it.