After Mairesse-Lebrun's escape from the park (see #8),
prisoners in solitary confinement took their exercise on the northwest terrace.
During his walk on this day, Flight-Lieut. Don Thom of the Royal Canadian Air
Force suddenly leapt over the terrace's balustrade and grabbed ahold of the
crossbars in the windows of the guardroom. He dropped to the bars of a lower
window, which he held for a moment before dropping to the ground. As the guards
opened fire on him, he got over a barbed-wire curtain and ran into the woods
before being stopped by coils of wire. Security officer Reinhold Eggers
called it "the maddest attempt of all."