A shoemaker has been described by Tube bosses as "stupid" after he made a pair of boots that allow travellers to hang upside down on carriage handrails.
Dutch-born Eelko Moorer designed the boots in his studio in Hackney Wick, east London.
The boots have been designed with a slot carved into the heel which allow them to hang from handrails.
Mr Moorer got girlfriend Alice Wolff to try the boots out on the Tube.
But London Underground criticised the designer, saying his design could result in serious injury.
A London Underground spokesman said: "This is a dangerous and stupid act that could result in serious injury to not only the individual concerned but also other passengers."