A contractor leaves an unfenced excavation full of water on a vacant lot and a neighbourhood child drowns. The attractive nuisance doctrine matters here because it:

Explanation

Attractive nuisance holds an occupier responsible when an artificial condition likely to draw children — a pool, an open pit, discarded machinery — is left unguarded and a child too young to appreciate the danger is hurt, even though that child is technically a trespasser. The doctrine changes the duty owed, so calling the excavation an ultrahazardous activity misstates it. Weak parental supervision may reduce an award but does not extinguish the occupier's duty.