If an electron moves through a double slit without being subjected to any measurement device it will act as a wave and cause interference patterns on a screen. If the electron it measured before or after the slits it will act as a particle and no interference patterns will be be seen on the screen. What if the screen where to act as both screen and measurement device (to measure spin for example). Is this possible? Would the screen act as screen and measurement device at the same time "fooling" the electron ? Can it be done? and what would be on the screen: interference patterns or no interference patterns?