[The Self-Taught Man] has lowered his voice and his face has taken on a roguish look.

"What sort of adventures?" I ask him, astonished.

"All sorts, Monsieur. Getting on the wrong train. Stopping in an unknown city. Losing your briefcase, being arrested by mistake, spending the night in prison. Monsieur, I believed the word adventure could be defined: an event out of the ordinary without being necessarily extraordinary..."

Jean-Paul Sartre, Nausea