They were starting to  run out of penicillin, so what they would do  was run with his urine across the road to re-synthesize  the penicillin from his urine and give it back to him, and that worked.
Zaczęło brakować im penicyliny, zaczęli więc po drugiej stronie ulicy odzyskiwać penicylinę z moczu i ponownie podawać ją choremu. Zadziałało.