bardzo niebezpieczna działalność

rzeczownik

full

ultrahazardous activity

noun

Definitions of ultrahazardous activity

an activity, action or process that is so dangerous that the person or entity conducting the activity is strictly liable (=legally responsible for something without having done anything for which you are personally to blame) for any injury caused as a result of that activity

Some people consider bungee jumping an ultrahazardous activity.