near misses

A near miss, near death, near hit, or close call is an unplanned event that has the potential to cause, but does not actually result in human injury, environmental or equipment damage, or an interruption to normal operation.
OSHA defines a near miss as an incident in which no property was damaged and no personal injury was sustained, but where, given a slight shift in time or position, damage or injury easily could have occurred. Near misses also may be referred to as near accidents, accident precursors, injury-free events and, in the case of moving objects, near collisions. A near miss is often an error, with harm prevented by other considerations and circumstances.

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