I once saw a programme about a Japanese contest for the most inefficient vehicle. It was won by a human-powered electric tricycle.
The inventor pedalled like mad just to make it move at all!

I wouldn't say that the machine above is entirely useless. It would keep some people entertained for whole minutes.


I once had a friend who could fairly be described as 'A simple machine for turning beer into piss.'
We deserved each other, I think. Wonder where he is now!