Abnormally dangerous activity

Abnormally dangerous activity:
An extremely dangerous activity with the risk of death or serious bodily harm. Such activities are often subject to strict liability, which makes a defendant liable even it were using reasonable care. In determining whether an activity is abnormally dangerous, a court will consider these factors: a high degree of risk of some harm to person, land or chattels (personal property of others; the high likelihood of harm resulting from the activity, inability to eliminate risk through due care; extent to which activity is NOT a matter of common usage (carried on by the great mass of mankind (driving cars is an example of something that is common usage and driving huge, heavy machinery, or blasting for excavation, while certainly a proper means of doing particular trades, are not carried on by masses of people); inappropriateness of activity in the place where it was carried out; and the extent to which value to the community is outweighed by dangerous attributes. These factors come from the second restatement for the law of torts, which is most widely used by the states.
See also Ultra Hazardous Activity.