I hope they don't get tired.
Attempts at breaking and setting nine world tyre-flipping records are being made in Newcastle.
Phil Pugh and Paul Hopkins, from North Tyneside, have organised a one-hour continuous flip, a number of women's and men's sprints and a relay.
Mr Hopkins, a retired firefighter, will also be part of a team flipping a 100kg tyre for 12 hours to raise funds for two children's charities.
The 57-year-old said it was about "putting something back".
"It's no good sitting back and waiting for other people to do things otherwise things don't get done," he said.
https://www.bbc.com/news/uk-england-tyne-58207214