Researchers who suggested that mountain climbers could be used to remove kidney stones are among those recognized with a sought after Ig Nobel Prize.
The awards, held at Harvard University and organized by the American magazine Annals of Improbable Research, celebrate unusual, fun but practical scientific work.
The 28th annual ceremony featured the traditional public-educational "airplanet air raid", while real Nobel Prize winners were available to present the prizes.
Long assumptions are kept short with an eight-year-old girl who repeated "please stop, I'm bored" after 60 seconds.
The price of medicine was awarded to US researchers for their investigation into the use of mountain bots to accelerate the kidney stones.
Professor David Wartinger, Michigan State University, began looking at the area when one of his patients reported that riding on the Big Thunder Mountain ride in Disney World, Florida, had emptied his kidney stone.
He built a model of a patient's kidney system and tested it on rides to prove theory.
Prof Wartinger told BBC Radio 4 today's program: "Anyone trying to benefit from our research should look for a rollercoaster, which does not have to be fast, but you want a fast and rough mountain range with much upside down and side-to-side movement.
"In fact, the really fast coasters that go 1
"I can not tell you about a general consensus, but I'm telling you that in the last decade we have known that we have been aware of this research, we have recommended it to our patients with great success.  "It literally stretches the stone loose."
Dr James Cole, an archaeologist from the University of Brighton, was also acknowledged and took home the nutritional price to quantify the human body's heat value.
After finding other animals, much greater calorie yields questioned he thought that human ancestors chased and consumed members of their own species for strictly nutritional reasons.
"It is possible that some of our ancestors may have eaten their own members of necessity – but it is more likely to think about the action of cannibalism in a social framework rather than nutritional, he says.
Dr Cole said he was "honored" to have his research recognized with an Ig Nobel and added: "Human cannibalism is a subject that continues to keep a morbi d fascination in modern societies.
" Identifying motivation for human cannibalism is still a controversial issue. "
Here are some of the other winners of the year's awards:
– Scientists who showed wine experts can reliably identify, by smell, the presence of a single fly in a glass of wine was awarded the biology prize .
– The literature award went to an investigation entitled "Life is too short for RTFM: How the Users Are Related to Documentation and Excessive Properties in Consumer Products." The study documented how most people using complicated consumer products do not read the user's manual.  – A Japanese doctor who thought of a "self-colonoscopy", as he has shown, won the Medical Education Prize.  – The Economics Prize went to researchers who investigated the effectiveness of the employees who used Voodoo dolls to oppose their bosses.
– Spanish scientists won the peace prize to measure the effects of screaming and cursing while driving.