Jim and Mary were both patients in a Mental Hospital.  One day while they  were walking past the hospital Swimming pool, Jim  suddenly jumped into the deep end. He sunk to the bottom and stayed  there.

Mary promptly jumped in to save him.  She swam to the bottom  and pulled  Jim out.  When the medical director became aware of Mary's  heroic act he immediately  ordered her to be discharged from the hospital, as he now  considered her to  be mentally stable.

When he went to tell Mary the news he said, "Mary, I have good news & bad  news. The good news is you're being discharged because since you were  able  to jump in and save the life of another patient, I think you've regained  your senses. The bad news is, Jim,  the patient you saved, hung himself with his bathrobe belt in the bathroom.  I am so sorry, but he's dead."

Mary replied "He didn't hang himself, I put him there to dry."