Back in 2012, during our first Venice Carnival Photo Tour, we were fortunate to gain entry to the Nason Moretti glass-blowing factory on the island of Murano. We spent time photographing in their showroom, which was a fantastic experience as they produce some fabulous items, but the most interesting part of the visit was getting access to the factory floor and waching the glass-blowers work their magic.

What we soon realised was that each item followed a clear pattern. In this instance, the guy in the center would roll the oval of glass while the one on the right would wind the almost molten glass around it. The end would then be cut. When they completed this step they would move to another station to carry out the next part of the process.

All I needed to do was wait for just the right moment, and I decided that this would be the point at which he cut through the glass. On this occasion though, just before I meant to press the shutter, the man on the right entered the frame and I grabbed a shot.

In terms of my original aim I was about half a second too early, but this ended up being one of my favourite shots from the trip. The additional hand, unexpected though it was, made the shot.