The wrong doctor wrong patient
I had just had a thyroid operation. Nurse told me the surgeon was in to check me out and let me go home from hospital. When he turned up she waved at me from the nurses station. He came over and said. "Well steve we can send you home today but first let me look at your foot." I am thinking 'my foot?' He pulls the blanket off one foot. Then off the other and jumps backwards. "I cut that off yesterday! How did it grow back??!" At that moment I realised I was in the wrong hospital.