An “angry pig” confronted engineers in a London street, delaying their repair of a burst water main before it was led away with a bag of crisps.
The pipe burst on Lamberts Road, Surbiton, damaging nearby railway equipment, which caused train delays.
Thames Water said their efforts to reach a valve to cut the water were initially hindered by “a large pig” which was “acting aggressively”.
It is not known what flavour crisps were used to lead it away.
Damage caused by the flooding of tracks and signalling equipment meant limited trains have been able to run along the line.
Disruption is currently expected to last until 16:00 GMT although Network Rail said engineers were carrying out inspections.
Thames Water said engineers “were quickly on site” to deal with the burst 120cm (48 in) pipe, but they had been unable to initially carry out the work because of the pig, which is thought to be someone’s pet.
Hammersmith Bridge could cost £120m to repair, engineers have estimated as the first stage of work begins.
The 132-year-old bridge was closed indefinitely to motorists in April after “critical faults” in the cast iron casing were found.
Transport for London (TfL) has financed the first £25m of the project but the main funding source has yet to be decided.
The work is expected to take three years to complete.
Hammersmith & Fulham Council is working with TfL to secure funding for the next phase of repairs in spring 2020.
The £120m estimate could change due to the “unknowns, complexities and challenges” of the bridge, the authority said.
Council leader Stephen Cowan said there had been “significant failings” in the bridge structure which has seen cracks appear in some of the pedestals.
“We’re focused on getting the bridge reopened to cars and buses as quickly as possible”, he added.