Walking along a carpet and having built up static charge, when touching a metal doorknob which is connected to the earth, electrons on the body will be transferred to the doorknob
When rubbing a balloon against your hair, electrons are transferred from the hair to the balloon, making the oppositely attracting objects stick to eachother
When a negatively charged object is bought near a neutral wall, the protons in the wall are drawn to the surface and the electrons are pushed back, as the protons are attracted to the negative charge
The Van De Graaff device is a metal ball with a rubber belt. When the belt is turned, the belt becomes negatively charged and the ball becomes positively charged. Touching the ball will cause a shock