Nothing fancy (just stupid) . . . .
I almost hit a 400 thousand volt set of powerlines going at about 115 KTS, there were diagonal to a highway that I was overflying looking for a stolen truck, when I saw the wires out of the corner of my eye they were very close, (3 seconds away) I pulled back on the cyclic so fast and far back that the 206L4 went past vertical, and I just kept pulling the cyclic.
That was my scariest moment so far, and the sad thing was it was completely avoidable.