He is extremely lucky, he really would have been lampooned had he crashed next door to a shoolyard full of children instead of a mundane looking fleet of trucks which look suspiciously as if they may contain high octane aviation fuel.
Perhaps the airport authority should re zone sections of the airport where there are suspicious looking helicopter pilots to have them engage their activities inside protective earth bunds which would contain all sorts of inadvertant liquid run off??
tet
ps
Just maybe the hyd off was a lazy man's cyclic lock whilst messing around with other things, instead of just overlooking the check list. know of a couple of blokes killed because of that. M/R blade contact with cranium.