IHL . . .
No loop here, have you seen those little ribbons people pin on themselves to show support for something? That's what it looked like.
I pulled the cyclic aft and and a little to the right, so when the nose went past vertical the nose was also about 30 degrees to to the right, I just kept the aft pressure until the nose dropped again and kept the back pressure as the airspeed built up quickly and I pulled out now going to the left of my original track, I had indeed a vertical 270 turn to the left I will never forget.
A loop would have been if I had ended up on the same heading, I started the turn to the right and ended up 90 deg. left of my original heading. I remember after it pulling out I was flying parallel to the wires which were now on my left side as I had passed them already.