Bicycle detail

We were eating in the new Vietnamese restaurant, I was facing the front window and the bike was directly in front of me locked to the wooden fence but below my line of vision. We were in there for maybe an hour, nothing unusual was happening outside. When we came out it was gone (except for the seat which I have) and there was no damage to the wood of the fence. Whoever did it was a real pro. Wasn't the best cable but it was a thick kryptonite one with a disc lock the kind they use to lock up buildings. I believe they cut it from the other side discreetly and then just walked off with the thing.