User Manual Marcy NS-654 Foldable Bike

Almost the same as when opened. It doesn't fold flatter, as pedals and handles and base still stick out, it just decreases the width of the center space by about 3 inches.

I wouldn't advise standing and pedalling. Although the bike is built sturdy, it might not support your weight (considering that you are an adult) during the long use. There is a reason why it is built with a seat.