E-bike rental company Lime has said its bikes are "not for jousting" after footage of two riders dressed as knights charging at each other in an east London park circulated over the weekend.
Hundreds of people congregated in London Fields, Hackney, to watch artist Jack Carden and actor Camtholomew the First joust, while riding the bright green rentable e-bikes.
The videos on social media showed them dressed as knights in armour, complete with chainmail and lances, attempting to knock each other off the bikes.
A spokesperson for the company said: "While we appreciate the medieval spirit, safety must always come first."
Ahead of the event, Carden said the "free public joust" was "performance art" in a post on social media.
A video on his Instagram account of the event has been watched more than four million times.
Despite their popularity, hospitals have reported an increase in injuries to both e-bike riders and pedestrians.
A spokesperson for Lime said on Monday: "We always love seeing Londoners come together and build a sense of community in unexpected ways.
"While we appreciate the medieval spirit, safety must always come first.
"Lime bikes are designed for getting around the city, not for jousting.
"We discourage anyone from attempting similar events, to help keep riders and those around them safe."
Listen to the best of BBC Radio London on Sounds and follow BBC London on Facebook, external, X, external and Instagram, external. Send your story ideas to hello.bbclondon@bbc.co.uk, external
Electric bikes and scooters
Hackney London Borough Council
More coverage
Comedian Paul Whitehouse mugged at London cash machine
Woman says she ‘closed eyes and tried not to be there’ during alleged Russell Brand rape
Schools ‘explosive device’ email not viable threat – education minister
Discussion