ride on somebody's shoulders
ride on somebody's back

Others rode in standing up or on the back of the professional.

Most of the time after the work is done and the bike needs a test drive, I ride on the back with him.

Without money for food, they rode 18 hours on the back of a truck.

If somebody saw you riding on the back of a bus, he'd tell your mother.

"Funny to see all those kids riding on its back."

Riding on his back is one of the season's greater pleasures.

And, to complete the picture, there was a beautiful lady riding on its back.

Will that pass me in or do I have to ride on your back?

"If it wasn't for her, I would still be riding on the back of that bus."

Riding on the back of this successful 'First', plans are now being made for further courses in 1992.