If we had the jumping ability of a flea, (I assume you mean scaled up to human size), we would be able to jump metres up into the air. If a flea can jump over 30 times higher then its own body height, imagine a human doing the same.
Nothing would happen. Humans ARE animals.
They would die.
Someone would have to invent them
we would die
The same thing that would happen to humans if we had no food.
Nothing will happen but why would you want to do this.
then you would not even be here
we would not be able to walk
we couldnt see
we would all be eaten by flies
Many would die.
Humans are already animals, being part of the animal kingdom. Therefore, what would happen is that we would carry on as usual.