While traveling in a Red Cross ambulance with driver Ernest Hemingway, Joe offered a ride to a Belgian soldier. Unaware that the man was Indiana Jones, a fellow American, Joe noticed Indy's Belgian uniform and made fun of him throughout the journey, throwing xenophobic insults in English. Indy pretended not to understand and replied back with insults of his own about Joe in French. When they arrived at the village, Indy thanked Ernie for the ride in English, embarrassing Joe and giving Ernie a good laugh.
Behind the scenes
Joe was played by Martin McDougal in "Northern Italy, June 1918".