Dangerous driving

From a recent experience, I add 2 new hazards to dangerous driving:

1) Driving off without first checking if all passengers are on board, especially if someone is entering the vehicle halfway head first.

2) Driving off without first checking if all passengers have alighted, especially if someone is leaving the vehicle halfway leg first.

Which probably boils down to the age-old basic rule of checking the rear view mirror before moving off with the vehicle. So dudes, pls pls PLS drive safely!!