A man is attempting to push a Brussels sprout up Snowdon with his nose.
Stuart Kettell, from Balsall Common, in the West Midlands, set off at 07:00 BST and hopes to reach the 1,085m (3,560ft) summit in four days.
The 49-year-old, who wants to raise at least £5,000 for Macmillan Cancer Support, will replace the sprouts as they fall apart.
It is his latest in a series of fundraising challenges, which have included spending a week in a box.
Cameraman Richard Crump, who is filming Mr Kettell's challenge, said: "The first day had been gruelling for Stuart.
"He has no skin on his knees, his wrists are hurting and his neck is really tired. But he is still going."
Mr Kettell, a cameraman, has also walked along every street in Coventry on stilts and ran in a giant hamster wheel.
So far he has raised more than £40,000 for the charity.
"We have had a lot of funny looks," added Mr Crump.
"Some people are bemused. A lot of people have recognised him as the sprout man."