  We propose a simple experiment that everybody can carry out just while
reading this paper. The only thing we need is a pen or a pencil and a finger.
The dynamics of the falling pen, which is in touch with the finger, depends
essentially on the initial inclination angle of the long axis of the pen. We
point out two different types of trajectories of the falling pen and we
investigate initial conditions for each of them to be realized. We write
differential equations describing the dynamics of the pen and analyze them both
numerically and analytically.
