A US state has unwittingly started a legal debate with an advertising campaign urging drinkers to get a lift home.
Montana's Department of Transportation issued a public safety video that features a horse picking up a rider at a bar.
It was intended as a metaphor to encourage drinkers to seek alternative transport.
But it is being taken literally by some in a state well known for its horse culture.
Helena Police Chief Troy McGee said he has received many calls from residents wanting to know if riding a horse while under the influence is legal.
Mr McGee told the Independent Record newspaper that it is.
Montana law carefully defines a vehicle, and excludes those running under animal power.
The popular 30-second video titled Sober Friend shows a savvy horse carefully obeying traffic laws on a night time journey through town before stopping in front of a bar to pick up a rider.