Thoughtless deeds and unscientific methods often lead to failures and falls. Though they can be said to cause fun, they cast a heavy premium on the safety and positive end result. The lesson is that those actions can be done in better ways without any failures with a little bit of science and common sense. The fails: A person walks carelessly on a slippery wooden floor and falls down. A cycle-riding boy tries to bump over a small mount on the road by lifting the fore wheel, when, losing balance, he falls down. A tank running over a bridge goes to one side and tilts and falls into the water.
A skating man takes no care to balance, and hence falls down. So many instances can be quoted as typical fails. But remember, they are all avoidable if only a little care is taken.