My Husband has been experiencing a sharp stabbing take his breath away pain, but short term pain on his left side of his rib cage. I t only happens when he rolls on his side. But he can poke and prod that area after the pain subsides and nothing, not even a tender spot. He has no trouble breathing, no chest pain. He did unstack move, load and restack 150 computers and 75 crt monitors 24 hours before the pain came. Any thoughts on the possible causes?