Sorry, to be so blunt, but while I am not completely sure what you are saying, I am fairly certain that it's nonsense. You want to turn yourself around, head down and hands on the pedals!?
- There's no space for your head.
- Trying to see forward from tilted down so far will quickly damage your neck.
- Legs are longer than arms, you won't reach the pedals. (Unless your proportions are highly unconventional.)
- I assume, even if you had somewhere to put your feet for more comfort and stability, balance would be horrible.
If your legs need a rest, ride more gentle or get off the bike instead or injuring yourself with such an idea.