On 29 February 1944, Wojtyła was knocked down by a German truck (lorry). He thought he would be badly treated. The German officers sent him to a hospital. He spent two weeks there with head and shoulder injuries. It was at this time that he decided that he must become a priest. When he left hospital, the young Polish men were being sent to Germany for training. He escaped to the house of the Archbishop. He hid there till after the war. On the night of 17 January 1945, the Germans left the city. The priests and teacher and students went back to the seminary. There was a big clean-up to be done. Wojtyła offered to clean out the lavatories.