We love this guerrilla stunt that got people talking in Milan last week. Stunned shoppers stood back from a misplaced submarine that had apparently surfaced on a busy Milanese street.

The campaign was created by health and travel insurance company Europ Assistance to coincide with the opening of its new store.

Alongside the physical experience, there were also a few videos released that appeared to depict the moment the sub surfaced. Brilliant!