Restatement Second of Torts § 520
In determining whether an activity is abnormally dangerous, the following factors are to be considered:
- existence of a high degree of risk of some harm to the person, land or chattels of others;
- likelihood that the harm that results from it will be great;
- inability to eliminate the risk by the exercise of reasonable care;
- extent to which the activity is not a matter of common usage;
- inappropriateness of the activity to the place where it is carried on; and
- extent to which its value to the community is outweighed by its dangerous attributes.