John Kennedy was shot and killed while riding in an open car.
the others in the car.
Yes, you can yawn while sleeping, I've seen it done many times.
the others in the car.
when you yawn you get rid of carbon dioxide and breathe in oxygen.
while sleepy CO2 accumulation increase and to get rid of it we yawn.
Pressure
no car cood crash
wearing a seatbelt in the car
too many
yawns are contagious becuase when we see another person yawn our brain sees it as that person is gasping for air and they dont have enough oxygen so as a defense mechenisme we will yawn also.
like riding in a car while sitting in a la-z-boy. they handle differently, and turn corners much wider.